Hi dab,
Here is a better map with legend...
http://www.magictrips.com/images/maps/po-rsfq-map.gif
There is a parking area behind every building - it's the light gray area, so - for instance, we only parked in the main parking area to check-in, and then drove to our parking lot. There is a road that circles the resort that you take to get to the entrance of your buildings parking area and there are signs to help. The front desk can help direct you when you check in as well.
I think each building is two stories. I might be wrong, but I don't recall seeing any 3 stories and when I glanced at the bayou buildings they seems to be the same - 2 stories. The flight of stairs isn't bad at all, except if you have heavy luggage. I guess I might be wrong if you read there were 3 stories there - that's just all I can recall. We were on the second floor where we stayed and there was no third floor. I still would agree that the Magnolia building is the best one in terms of location. I know there are lots of people on this board that have stayed at the resort a bunch of times. Maybe they can help! If I were you, I'd post the question out there by itself on the "resort" board! As you know, that one gets more activity! :)