Boating is great, but at some point you probably will be going to shore, be it pier, beach or whatever. At that point you have "stuff" to lug around.
Most seem to use a variety of carts and other wheeled devices, or just lug the stuff, but the salt air/water/environment tends to be hard on this equipment, and trying to get across some beaches without all terrain tires might be a pain.
Anyway, this fellow had this problem and his solution is a set of custom designed carts, made of aluminum with coated metal and/or plastic wheeled, off-road style tires.
I can’t vouch for any of it, but the designs look interesting.