This was somewhat discussed already in the
Site and Facilities forum, so I would look at that for some info on which kinds might be good.
My old camp used a two-way radio system, and I think it is very worthwhile. Then people like the CD and the nurse can always have one with them and always be reached, which is very important.
As for brands and kinds, I have no idea. I know that at my old camp we had these big, old ones that worked great. Then some of them started to die, so they replaced a few with smaller, cheaper ones, trying to save money. They didn't work nearly as well and were kind of useless half the time. I'd say if you are going to invest in the system, shell out the extra at the beginning because it is really worth it.
