I came across this hammock hot tub. It looks like fun to try out but not really for your mainstream camper.
If you hate standing on the shower floors at campground bathrooms here is the product for you. It folds up for easy storage and can hold the shampoo, soap and other shower items while walking to and from the shower house. If you are handy you can probably make your own but for the rest of us, here is the link.