There should be round vents in the ceiling to distribute the A/C. I have seen a basement mounted A/C unit on a big (read expensive) Class A, but never on a fiver. I'm sure somebody will come up with an example to prove me wrong, but I've never seen one.
You will need a second, probably smaller, unit in the bedroom vent.
Formerly posting as "littleblackdog"
Martha, Allen, & Blackjack
2006 Chevy 3500 D/A LB SRW, RVND 7710
Previously: 2008 Titanium 30E35SA. Currently no trailer due to age & mobility problems. Very sad!
"Real Jeeps have round headlights"