Hi everyone! First post here. I've got a Rockwood A122s.
The number one reason I purchased this trailer was for comfort (specifically a good night's sleep). I was tired of sleeping on the ground in a tent and my wife says it's freezing when it's 70 degrees out...so we needed something with a dedicated bed and decent heat/insulation.
The mattress that comes with this trailer is pretty good, for a camper mattress. But I wanted something with more cushion and there appeared to be plenty of room for a thicker Full XL mattress. After doing a lot of research I landed on this one:
Amazon.com - LUCID 10 Inch Memory Foam Mattress - Dual-Layered - CertiPUR-US Certified - 25-Year Warranty - FULL XL - Lucid Matreess Foam
It's a Lucid 10 inch memory foam mattress available on Amazon. I got it for about $310.
I removed the factory mattress, rolled out this new one and let it sit for 24 hours with the trailer popped up and the vent open a crack to allow the air to circulate. When I returned the next day the mattress was fully expanded and ready to go! And it's a perfect fit. It's about 2" taller than the factory mattress, but there's still plenty of clearance to fold down the sides.
I took it out last week and got the best night's sleep I've ever had in a trailer. And, it's actually easier to lift the mattress to get into the under-mattress storage because this mattress bends more easily.
I know these mattresses aren't for everyone, but for me it was great. Especially if you're a side sleeper and get tired of bruised hips & elbows!
I haven't found a fitted sheet for it yet...just using a queen flat sheet for now.