As far as walking around it is said that in AP you lose all your physicial sensations and pretty much float around. I guess walking could be a possible task, although it seems most people who believe in AP would rather fly than walk. LOL. In LDs physical sensations is just as real as in waking life. Of course if AP is a dream then you may feel nothing simply because you believe you with feel nothing. Much like in a LD, if you think something will happen it usually will happen because everything that takes place is made up by your mind.

I cannot say for a fact that AP is not real, but it hasn't been proven. I guess you can take that howevery you want to take it.