Good on ya getting out bud

Just use chicken drumsticks or wings as bait. Cheapest and easiest bait just cable tie them in your pot. 

When I use to crab in mandurah I use to go down in the harvey inlet on the Birchmont side. There is an old weather platform of some desciption in the middle. There is a assive sand bank that comes out close to that platform. I use to drop nets on the edge of that sand bank then walk the sand bank scooping

Good Luck

Pig 

 I use chicken wings and put the wire clip through the middle section of the wing in between the two bones. I also put the wing on the out side of the net so it makes it harder for the shags and stingrays to get the bait

 Also where piggy said is a good spot to start. If scooping don't walk around with your scoop in the air. Prod the ground with the scoop as you walk 

 ok thanks

plenty of size crabs on sunday morning scooping. mate got one at 157mm in the estuary. we got our 10each in under an hour