Air mattress are horrible for camping. The lack of insulation makes for a cold night. If you have to use a mattress, take an extra sleeping bag zipped closed to sleep on.
If your camping at least a couple of times a year, a good insulated sleeping is a solid investment. The Exped synmat duo (two person pad) is compact and fairly comfortable. I like that each side can be pumped up separately so when one person is moving/rolling over, the other one doesn't bounce up and down. I have the long/wide version of the one in the video and it's much bigger. Looks about a foot wider. Fills up a 2P MSR tent.
As fair as dry bags go, the Wolfman Expedition dry bags are a SOLID piece of kit. I use a med size and put my whole camp in it. In my dry bag I pack a 2P tent, air pad, two stoves, two air pillows, 9x11 rain fly, 2 sleeping bags (down), two telescoping poles, a lawn chair and some small odds and ends. Can't recommend the Wolfman bag enough.
Exped SynMat Duo Sleeping Pad Video
The bags come in black or yellow. The three sizes pictured below. They are all the same diameter just different widths.
@302w