Even with that small of a room, I'd think about renting an orbital floor sander. You're going to end up sanding that 9' x 8' area at least 5 times. My knees liked sanding standing up. The orbitals are way more forgiving than the drum sanders.
The big keys are to keep everything clean in the room, and mask off the room from the rest of the house as best as you can. Then keep your sanding even.
We used the Varathane water based sealer. It goes on easy and has held up really well.
Rockin a 327 SBC