Not into Survival at all. Think it's super boring, that's just my opinion however.
Death Woods is pretty good imo, as is Diescraper Redux. Some insane choke points in that one, would be a lot of fun. But you'll really have to spam people to DL these. I was admin on another 10 v 10 that did custom campaigns. No matter how much we told people to DL or they'd get booted, it didn't seem to work. And I honestly think that is one of the main reasons the server ended up floundering. Every map change into that, 4-6 people stay, everyone else booted. And the inevitable 10 minute wait for people to DL. Also kills things at night when more foreign players are on. I think few of them even speak english. I've yet to see a server ever use customs in its rotation sucessfully. But if you do it, I'd only add 1.