Looking for idea on how to support my camper of truck?

If I'm just storing the camper I don't support it with anything else, there's no need. However, we end up "using" our camper a lot when it's stored. It's a guest room, an extra refrigerator, a place to escape the kids, etc. So, in order to make it a bit more stable I built a support for the front out of 4x4 post and 2x6 cross pieces.