Not a bad venue for outdoor geared events, as long as the inside facilities are available for air conditioning (which worked nicely for us).
My big complaint is how far Cashman is from the strip. Unless prearrangements are made, you can easily get stranded here if you took a taxi from a hotel. We didn't realize this as visitors who booked tickets to a show here months in advance and were caught off guard. We lucked out in that someone was being dropped off as we started to freak out about how we'd get back to the strip and how long it would take, but others were not so lucky.