Necromunda Anons,

I'm starting up a Necromunda dominion campaign with some of my buds. Everyone is keen to play, but its likely that we will not be able to commit to a set game schedule. Some guys will likely be more available than others, and thus will get more games in.

How would you handle this? My current plan is to be pretty laissez faire about it. If someone gets more games in they progress more than those who don't, and If the frequent gamers outpace the sporadic ones, then that's how it lands. I think my group is mature enough to handle it, but I'd like to hear suggestions from experienced arbitrators.

Additionally, how would you intro new gangs once the campaign is already underway?