Well, if you're going to be flying there, T-Rex size.

Anywhere that isn't either your own property or controlled access is too public for a Raptor, IMO. They're big, they're heavy, and that makes them quite dangerous. That said, they're also easy to fly, which means you're less likely to crash them. But, if you're not going to get the stick time or (worse) going to be tempted to fly them somewhere unsuitable, just get the smaller machine.

I actually find my Raptor relaxing to fly after the T-Rex.