I would argue for a compromise solution - the little giant ladder, cut in half and mounted to the camper like the scissor steps. You get the rigidity of being attached to the camper, but the stability of the larger and solid little giant steps. We tried out the scissor steps first, and found them to be less stable and heavier than we liked (25lbs vs about 5lbs). I did add adjustable legs to my little giant (repurposing parts from the 'safety handle') as we are often way off kilter. I am still not 100% pleased with attachment to the camper, so I will probably re spin that. but in general it works super well. On our flatbed we store it in a drawer under the tray, but I think it would fit in the center isle of the slide in campers.
http://www.wanderthe...r-mark-i-rev-b/
For us, the hitch mount steps wouldn't work, primarily because we are side entry, but also because of the loss of departure angle (if we had a slide in). The hitch is already the lowest point in the back.