OBG

I think a survival situation or a bugout situation is different from a leisure trip. A survival situation is very fluid. One day you may need to pickup 5 relatives whose car has broken down, and the other day you may need to haul bulk supplies from your home to your retreat. Motorhomes are not very flexible and you cannot (easily) remove its components to make space for this purpose or that.

Yes they are more comfortable and home-like , but less practical in a survival situation.

IMHO