April, May would be close to the best, following that, sept Oct before the ban. Still get good sized swell up there during winter, and strong winds in summer.

Beach launch is possible for sure with a half decent 4WD, but make sure you have some recovery gear, Max Tracks, 2nd vehicle. Launch is easy, retrieving is where people get stuck, need to be quick so your trailer does not sink.

In the past we have used long rubber mats under the trailer tires.

i went october 2 years ago and the weather was shyte . april ,may as bodie says , unfortunately i can only get time off in june so hopefully good that week in june too :)

This time of year would have to be the most user friendly the winds are a bit more predictable. You can launch in town the beach is hard and protected but can be a bit soft as you come off the bitumen.
Little bay can be another option follow the road past the golf club north,only about ten minutes from town.Same as in town beach is hard but a short section of soft sand just follow the signs to keep on the right track.
There are plenty of spots to camp at in the designated areas for 15 bucks a night per car.There are toilets and bins Zed the local shire guy makes round most arvos.
A 4x4 is a must but I have seen 6m glass boats towed in and launched , hope this helps.

Thanks guys for your much appreciated advise, I will be using a Nissan patrol. Hopefully that will be enough grunt for the launching and retrieval.

the launch in town could of almost done it in 2wd my dotty old man made it look hard to start with as he forgot to take the handbrake off