you should only need two to start up. so that should be enough to start the server which should reset it to what ever you set it up for. at least that what i had to do when i had mine. but if you need another person and im on send me a message and ill join you to get it started.
another suggestion is to maybe put a couple of TDM matches in there. i ran TDM all the time and it was always full. sometimes i could not get in my own server. i know you hate TDM but it is a very popular game mode.