In reply to pasbury:
I’ve OA in fingers incl pinkies. At the start I taped, but stopped after a while of doing this. I trained myself instead not to use the pinkies with any strength, and use more open holds generally and so didn’t need to tape.
In the early days it was essential after any climbing session to plunge hands in iced water as another has mentioned. Controlled pain and stiffness once they warmed up again with blood pumping back in. After a few months though I didn’t need to do this regularly, but only after a really hard session.
My level of climbing is not high so it has not been a problem altering technique. Of course there is little strength in my pinkies nowadays! There again I never really had a lot of strength in them. Since OA I’ve used the pinkies as little as possible so with carrying bags like you mentioned, I leave them out of the grip, and try and avoid having them bent too much anyway and certainly not cross load or have pressure on the joints.
With other fingers affected by OA though, I’ve found using them has helped them to keep going. Warm up well, and once they start getting to sore lower the grade a bit. I’m happy though to pace my climbing and not go for max, but manage within ability that fingers will cope with.