I didn't really get locked in or out yet, although knowing some griefer, it's bound to happen. I just haven't finished my wall yet. I made two different palisade walls, which end in Corner Posts. And I BELIEVE they are two spaces apart on paved ground? I can fit two items between them. But right clicking either won't let me build a gate.
I hate dat my 'Perfectly Square' fence didn't work out... actually not really. This whole place is a mishmash, and looks like someone already messed it up by their cobblestone placements... but I figured the place would be salvageable. I might be wrong. I dunno. I'll post a screenshot so you guys can see it.... but... I'm trying to make this work.
(Also, I applogize for being a nub and not knowing how to resize the SS so it doesn't eat the page's space...)
Edit!: Also! This is vital! Do the fences have to be completed? Do like, I have to have four walls before I can put up the gate? Because if that's the case, I havn't built my back wall yet because it's to a hill, and noone can get in or out anyway.