Meh, 2 trips, 4 weeks total, no issues with the mattress, and I have a bad back.
I would highly recommend giving the mattress a chance before blowing money. You may find you want to replace it, but maybe not. I'm pretty sure there's a Costco or some other store wherever you're going camping in case it's not working out.
2019 ORV Creekside 21DBS
2018 Ram 2500 Diesel Mega Cab 4x4, AEV Lift/Wheels, 37" Toyo RTs, ARB On-Board Air, Snugtop XV