Put a stakewall around your base. It'll prevent your structures from drawing aggro (most of the time). While you're inside your walls all the nasties should just wander aimlessly around your base. If that's not enough use spikes. You're in the black forest so you have no shortage of corewood. And if you need help don't be afraid to ask :) I'll happily come help you out and watch your back while you establish a stronghold