I use moats, and high walls on my side of it. At the ends near water I usually curl the moat out a bit away from the base both directions. Then put a stake walls gauntlet at the ends. You start learning how far out to go away from the base and the mobs tend to give up, or get enough out of aggro or sight range to care.

Only raid events I have to pay attention to. But even those have never got to the inside. Usually end up shooting a few, then the event ends with minimal damage.