Not in direct address to you, DKL, but I'm quoting you just to remind Taoftw. John, be sure to talk to Haunts too before someone (I would assume you), goes to the venue to speak to the owner personally. Streaming equipment is definitely one thing that needs to be checked there. Aka, just let them know we will bring x and y and tell them as long as Z condition is met, there will be no problem.
Pretty much from what I know, all that's needed is room and an upload connection that's 700 kb/s at minimum. I'm sure it's all covered, but just double check with Haunts before you go.