Shad71
WKR
Yup I have done the same thing many many times hunting. Works just fineI sleep in the bed with a topper. I use a 0° sleeping bag and a down comforter. Sometimes I'll run a Mr. Buddy heater for a little bit before I go to bed and when I wake up. Works great for me into the teens.
I would get a topper, they are nice for staying in and keeping your gear dry, safe, dust free.