I have looked at 'em but have a concern
The campground I am in just now the word "level" refers to a carpenter's tool. and not much of anything else. Or how high the water is in the lake.
So on one site, my bottom step, i have to dig out for it to extend, and on the site I"m on now the last step is about 1/5 as high as normal (Bottom step to ground) with traditional MOunted steps not a problem
But with those solid steps that fold in,, Well you are going to end up with some weird angles