Yeah, you should come over sometime! You can help me with my stuff and I can help you figure out stuff for your costume.
You don't necessarily have to create the power armor from fallout 3, but you could make a pretty awesome post-apocalyptic soldier/warrior type costume. Use the gas mask, cut up some plastic trash cans to make a few pieces of armor, get some grungy clothing and carry around a machete and some weapons (you probably can't take a machete into a bowling alley). If the costume looks cool who cares if it matches something from a movie/game specifically. Anyway thats just an idea. You'll come up with something I'm sure.
I'll send you a text-message later so when can figure out when we can meet up to work on stuff.