I would say, as a general rule of thumb....

Las Vegas has LOTS of small advantage plays. It's going to be very rare to find a huge play in Vegas. Outside of Vegas, there are fewer advantage plays, but they can be worth a whole hell of a lot more. At least in my experience.

A local (AP), is going to be playing at casinos where he gets good offers....but that requires you to come back several times to collect on the offers. Not something that an out-of-towner can really do effectively. There are few things that an out of towner can do and have an "immediate" advantage play -- where his EV is tied up "right now", and not something where you lose up front and collect on the back end.