I personally prefer not having the translocator, but I believe no translocator is a default mutator that could be voted per game.
As for the FragBU times, I think a smaller window of when the event is would be a good thing. An official 5 hour time slot on fridays, or such. Otherwise the player count will be too spread out and too low.
Regarding the custom content, perhaps it would be best if a "FragBU pack" was compiled. I know that some Holp maps aren't played at all, same with some CBP maps, and downloading all of the packs individually could discourage some players. Having BU folks vote on what should be in the "FragBU pack" would be easy enough, and I'm confident that the HOLP and CBP guys would allow such a pack to be created.