QUOTE(Toothfairy)
that would be a possiblity but, when u get near the end, you are able to travel back and do things.
Or are you? =p
If using multiple maps isn't an option you're just going to have to make the most of one map. Make areas smaller, reuse areas, remove areas, etc. You can fit more on one map than you might think possible.
P.S.
You should lock this topic before it starts spinning wildly out of control.