[ILDiver]

On the wetsuit, if your comfortable in it for the amount of time your in the water, it will work. The open cell suits are nice, but not required. I have an Omer and love it.

The gun, it depends on vis and the type of fish you plan to hunt. Does the gun have a reel? Or is it a short stretch of line off the Muzzle?

Cocking the bands should be tough. There are several threads on the proper way to pull the band(s). I tried the chest method and it did not work for me. I used the hip and I got it but not easy. I've tried the chest method again and figured it out and it's much easier than the hip method. A chest pad on your suit may help too, so the butt end does not dig in.

Good luck.