RV's in general are made of the cheapest, lightest materials available today. Your walls are probably 1/8 inch luan with pine studs, insulation, and aluminum. Some campers are also built with Aluminum studs.
If you're going to try and hang something, I'd be very careful. Command strips/hooks are great. Otherwise, you'll need to screw into a stud or mounting plate (like for a TV, etc) those will be clearly marked.
Generally, I don't hang anything on the walls. Cabinets are a different story.. for those, I'll sometimes add a backer plate and screw through the cabinet into that.
2015 Crossroads Sunset Trail Reserve ST33FR
2007 Ford F350 King Ranch Crew Cab LWB Dually w/ Bulletproofed 6.0 Powerstroke.
Currently located between Georgia and Insanity.
007matman AKA Matt