This is the one we bought. It’s $50. I think there are cheaper options but I liked that it folded up and went easily into a carrying bag. This has made it easy to take places/travel with. I used it for 5 weeks at my office when our daycare closed for covid and I brought my DD to work with me and have used it on two vacations to disney and will use it a 3rd time at disney in April. When I tried to get my DD to sleep in pack and play without the mattress when she was at my office, she refused to nap. So, that’s why we tried the mattress and she finally would nap in the pack and play. So it was worth $50 to us.
one time at BLT they brought us a crib instead of a pack and play and that had a decent enough mattress in it. Idk if the cabins use pack and play or cribs.