If your heading to Warra a 375 is pretty small to be heading out solo but at least you have a 25 which should get it going nicely, I would only head out past the reef on the days of light winds and low swell and carry all the necessary safety gear, including a GPS, lots of sharks these days as well.
One thing to keep in mind is that if you do travel out past the reef take a few minutes while you are out there to think what you would do if your boat did overturn - how far to swim ? Can I get to lifejackets / epirb / flares ?? Most people tend to tuck all of that away in a small boat due to lack of space.
Your best bet may well be inside the reef, you will be surprised at the quality of good fish that travel inside the reef at night and that is if your confident and setup to fish at night.
If you do get outside the reef, trolling might suit you better and if you come across good ground, stop and have a bottom fish, I would have 3 setups ready to go, one for trolling, bottom bash and a spin rod setup with a stick bait etc for a close bust up of fish.

 Check what VHF channel the Exmouth repeater works on and also get in contact with the station about whether they still run a repeater for UHF, from distant memory it was on channel 1. It would be a great help if you get in trouble while outside the reef

 You regularly travel 10 mile offshore solo in a 3.75 tinnie?

My experience with Ningaloo through winter is medium to large swell hitting the reef edge. If I was doing a trip like your planning, I would focus on making the most of the lagoon as the core, but have a bit of gear to cover fishing outside should you get lucky with conditions. With a bit of preplanning and site seleciton you can fish the lagoon day or night, which can work well for spanglies in places. In very calm weather I've found coronation trout along the reef front seemed to favour about 15m, which can be trolled with deep divers, so even if that is a bit close you've got the motor running and  can quickly head deeper if a big swell comes unexpectedly. For mackies tended to focus a little deeper, 20-30m. In addition to trolling, drifting in 20-30m with one bottom rig and one floater is a good combo.

Always have flares & epirb along with other emergency supplies in a grab & go bag at arms reach. Set this up after seeing another guy at the ramp with one and has a float tied to it so if it doesnt get taken on the way over its got a chance to float. Have a fixed radio on the boat but i think a portable one might be a better option and keep in at arms reach. I run a compact lifejacket if weather isnt great/turns or im in a place im unfamiliar with. 

Always keen to have a red hot crack and probably push further than most in a boat that size, but like to think im prepared should something go wrong.

Thats for the responses. More than happy to stay inside and catch squid, spangos & trevally if thats all the weather will allow. Just want to be prepared & have the best chance possible should i get a gap in the weather; because if its good, ill be going!

Cheers

 Sounds like you've taken all the necessary precorshuns 

 G'day Deano,

I've fished Warroora plenty of times in my 375 Dart and 15 Merc, camping at 14 mile and Sandy Point. First advice is book now! Its so busy up there that you'll be scratching to get a site where you want it anyway. We're heading to 14 mile in July school holidays and I had to book that 180 days from the dates at midnight.

Back to fishing - most old farts up there run 375 of varying brands so you'll be fine. Like you say pick the weather, have your safety gear on hand and head outside the reef through the main big passage when its nice and its easy. Caught plenty of macks in July trolling ver behind the reef. Quite often its actually calmer outside with big rolling swells that cause the lagoon to be choppy. Never really bottom fished much outside, just trolled. But dad has some beaut spots, some as far as 5 mile out which they would hit on nice days with a few tinnies.

According to my old man who's a 20 year Warroora vet, spanglies and fishing in general is better in April/ May but I've still caught plenty in July.

Track in is super easy, big arse vans use it. Fill up your water tanks in Carnavon and refill in CB at the caravan park, cant remember the cost. 

Good luck and have fun

Woody

 I would go to winderabandi point.I did a bit of plumbing and lived at Warroora and it does not take many people to make it crowded.A lot of bodies at 14 mile will be surfing.winderabandi you can camp right on the point but it is a bit exposed.It is a very short distance to the outer reef no matter where you camp.Statewide fishing rules apply.At Waroora the station owners encourage fishers to only take 2 fish a day.I have caught big Mackerel and spangled emperor at both places

 Hey mate, 

Cant comment of waroora, but have done the western side of exmouth in a dinghy similar to yours (4m though). We spent most of our time trolling 10-45m picking up plenty of macks and a few wahoo. Whenever we got below 16m we caught trout. 

One day we snuck out about 7km to 120m and did well on bottom fish. 

As said, plenty of fish to be caught on the inside, pick your days to go out and keep your head on a swivel. 

Best of luck 

 I have not got it correct.14 mile is the spot on the road to coral bay where all the caravan people go.very easy access and good offshore reefs.I worked at manilya roadhouse and it was not far.both places can be netted from shore and threadfin are common.At Winderbandi beach I have caught school mackeral and queenfish as well as big mullet and thread fin in the net so casting metal slices would be worth while if the wind is howling from the south.

Whatever you do, you better be back later in August for the Mackies trip hahaha