I can only really speak for my own club, but I've always been very happy as part of SUSS. We have an age range of active members from Uni first years to people in their 30s, all of whom get on great! I've learned loads from older members, and the club is very good at quickly teaching SRT etc to beginners. Having lots of younger members also means better and more varied socials. Also very easy to get on committee! We don't have a caving hut, but are only a short drive away from the TSG, who we are quite close to aswell.