The weather should be nice, probably highs in the 60'. I have never had a licence to crab before, but that doesn't mean it is not required. Look at the regs online and see.

Using crab traps is fun, but a crab net with the kids is awesome!

Just a net, chicken neck and time on the dock. I will never forget those days.
As to the sounds, make sure you either use a good bottomfinder and chart or use some GPS mapping software. Show going, is the rule. Our marshes get shallow quick and "big water" can be shallow also. Be careful and have fun!