I Will make my own build!
I would suggest we start off the cost of Deluth, MN (Favorite place in all of MN)
https://en.wikipedia.org/wiki/Duluth,_MinnesotaIt is a major port on lake superior. That also means lost of contraband coming in AKA drugs, stolen goods, weapons, people even (Like, its a serious problem.) No other large cities for miles. The bunker would be on the lake bed only a few miles off the shore. There is an escape submarine if there is a critical failure. Could house 2000, About 150 made it out. Failure was a hull breach, so no returning. Radiation is not very much because it's in the middle of nowhere.
PEEPS
30 Marines armed with L129A1s with 20 mags each.
10 Marine biologists
10 Crewmen (For the sub)
30 Workers (Repair, Cleaning, ect)
20 Naval Officers armed with FN F2000s with 10 mags each
50 Civilians