I have not heard about climbing but there is canyoning….have done it 3 years ago. You will need 50m rope, harness, helmet and wetsuit and say 8 quickdraws. This is because some of the canyons have bolted sections in them, for both climbing (grade 10 or so) and abseiling. No trad gear needed. You should also take inflatable air mattress to float along some of the streams as water is very cold. Commercial operators do these things but you can do them yourself also…..You will need to register with ranger office at the main campground which has maps of the routes. It is not really promoted but is tolerated. Although not climbing, it is great fun.