Did your buddy say if you're hunting the bay, flooded fields, or a pond? If you have deep water potential, wear some breathable waders, if not, your rubber boots should do fine. Hopefully your dog will save you from getting wet. I shoot #4's with a modified choke at teal and ducks. 2 3/4" are fine, but 3" have more range (more kick tho). Make sure you have your plug in your shotgun if it's not an O/U. Good luck!