1) Does the wooden door have to go into your main base? I mean, am I allowed to place wooden door leading into a booby-trapped section of my base. Is this allowed?
I believe all of the base must be accessible through wooden doors. But, if you want to make some that lead to traps, that's fine.
2) Can we block the wooden door with dirt or other materials?
3) Can there be traps at the wooden door? Or does the wooden door have to be a safe entrance into your base?
To blocking the door with blocks, I'd have to say no. This would ruin the idea by making the base unaccessible.
Finally, I'd say yes. Once again, as long as they are not things that make it impossible to access the base.