I think almost all of us on Spidernation have the free accounts. You should have unlimited postings on the football board, as far as I know. There is a premium board as well, but the main boards are free.
While UR's last trip to a dome in ND did NOT go too well, they did have a successful time in a more similar dome in Northern Iowa prior.
https://www.youtube.com/watch?v=JM6yCPJbBr8