Not sure on the rooms, first time going to Znatz I've been to Zdayz three times now. You could do what I've do for all of these events, ask around in the thread if anyone has a spot. One year I slept on a roll out cot from the hotel in a friends room, it was like ten a night. This year I'm staying with some guys I've only met on this forum (which is what I've done pretty much every time) I think I've got a room or the sofa at the very least.
2014 10th Annual Z Nationals @ Z1 Motorsports!!!
This thread should be a good spot to start, if you use the link in the Z1 guys sig and opening post it should get you to the hotel stuff.