I've stayed a Glenlough and crossaghs in the past - Glenlough is quite lively and a handy shuttle bus to Douglas but I think the hook-ups get booked well in advance.  Crossaaghs was very quiet during the MGP several years ago- its run by a religious group and the vicar running it was very helpful - facilities were good mainly because it was quiet - didn't think it was still operating, they had some kind of problem a few years ago and banned alcohol from the site which probably didn't help, don't remember any hook-ups. many people I know like Peel but I don't know how many hook-ups it has. I'd get it sorted ASAP if I were you.