I don't really see any advantage for US use and plenty of disadvantages already mentioned..In brown bear country, they would still be too low to offer any meaningful additional safety...

I like the one mounted on the trailer better, but mostly for the cool factor!

Personally, I like the free standing tents that hook up to the rear of the vehicle..In the military, we used a 9x9 wall tent that coupled to the back of a landy as a company Command Post and I have always thought it would make an excellent semi static hunting set up especially with an additional tarp added as a cooking porch...