Bryan
Some cells will be OK while others may not. A lot depends on the state of charge you left them in and under what conditions they've been stored. I'd advise a slow-charge and then, if you can, check the voltage across each individual cell. If you push a pin through the heat-shrink you can find a contact where the cells join. Any cell showing much below 1.2v should be regarded as suspect.
If all seems OK then several slow discharge/recharge cycles will do them good. By "slow" I mean less than C; C being the capacity without the H bit e.g. a 3300mAH pack has a C rate of 3300mA. I usually charge my NiMH packs at approx C/10 for 14-16 hours.
Glad to hear you're out and about again.
Dave M