Suspension Options

And as a follow-on to what Lowsuv said, if you are wanting to go on unimproved roads, or anywhere that low hanging plumbing would be a problem, consider that carefully when shopping. For instance when I was shopping, I found a trailer ( I can't remember the brand or model ) that I liked the floorplan, but the plumbing was low to the ground, and even worse, it was at the back edge of the trailer. So it was in double danger of dragging. On my Funfinder 189FDS, the plumbing gray/black drains are essentially right behind the tire, and fairly high. Knock on wood, I have never dragged any of that on the ground, and I have been up a few roads that were somewhat rutted, rough and unimproved.
Of course, if a guy ever has that left rear tire tire come apart at speed.....it's gonna play havoc with all that plumbing being "right there" !