... I picked up a 1" wide foam from Home Depot to put on the frame for insulation.
Don, I don't think the insulating foam is a good idea -- at least it wouldn't be on my Compact Jr.
The reason is that on my trailer there are only 8 bolts spaced about 2 feet apart holding the body to the frame. The foam will crush under the bolts, but not as much between them, so the body and floor will be distorted around the bolts.
I don't know about Bolers but I suspect that it also has widely-spaced bolts attaching the body to the frame.
Also, with the bouncing and abrasion the foam will compact over time, resulting is loose bolts. The foam was never designed for this kind of service and I don't think it will hold up very well.