I'm hesitant on tour company aircraft and flight staff for well reasons. Just research them before booking.
That area is large enough to wander around for a few hours, if your into shopping. I happen to be, so we can burn quiet a few hours there. The outlet is now fairly large, with the addition across the street. The area, is walkable, but don't expect allot of sidewalks if you leave the shopping area/restraunts/helo area. The helo tours are across the street by the outlet mall expansion, so its easily walkable from either parking area and easy to get too.
I take the sidewalk part back, it appears they finished it all the way to Apopka Ave.