I purchased standard mounts, just like for home. Since I am going to attach them to the outside of the closet space, I plan to use a piece of 1/4 plywood on the inside of the closet about 24" x 24". This will spread the load out and give the screws something with a little more "meat" to stick to.
03 Forest River Salem LE Travel Trailer 26BHSS
'12 Chevy Suburban w/ Heavy Tow Pkg
4 kids: G13, G12, G10, B6
2 Vizsla's Mizuno & Zeno, 1 Weimaraner Kayda
2013 Nights Camped 7