The seam on the Denver Mattress Comfort Choice RV Folding Mattress # DE53ZR isn't as noticeable since the design doesn't allow for a gap between the two pieces, but there is a difference in the thickness of the mattress pieces that would be very noticeable if your folding bed frame doesn't have a difference in height for it to match up with.
I completely understand the back pain though as I experience it myself when I go camping with my family. We ended up just buying some of the egg... view full answer...