Getting 5th wheel front cap clean without access to a hose

If I'm in a campground that does not allow washing, and the front cap is full of bugs, I use a foaming all survace cleaner. It might be labor intensive, but the foam softens up the bugs and crud and usually wipe off with a soft cloth. Meguires makes a wash/wax, it's not cheap and dosen't do as well on softening up the bugs. Between barley breaks, I can do the complete front cap in about an hour or two.