I hate taking up precious storage space with "gadgets", so I use a hand held dust devil with a beater bar. It works well enough to keep things neat during our trips. When I get home, I give the ol' RV a thorough cleaning with my house vac.
Carol- I too have a small electric blower to keep the site itself neat and tidy. Also, on long stays at FtW, I blow the roof of the RV off from time to time cause of all the pine needles and cypress "needles". DH wanted to bring our gas powered blower, but I do not like keeping a gas can in the compartment. The electric works just fine!