Hi Marietta,
I had my translab 9/2020. I am 37 and am pretty active. I don't find road biking difficult from a balance perspective, but I'm not very comfortable on the road because I can't tell where the sound is coming from. I feel like I am constantly looking over my shoulder, which isn't very fun. I found mountain biking to be really hard, all the shaking and not being able to maintain a steady focus, made me nauseous. I'm sure if I asked my PT, they'd say with practice and small rides, I'd be able to work up to it. I've been able to cross county ski no problems, but haven't been back on my downhill skis. I'm more concerned about other riders and safety without being able to tell where sound is coming from. I had a "hearing impaired" safety vest made, which is pretty dorky looking, but will hopefully make me feel safer if I'm on the road or ski hill. I also think I have a much stronger fear of heights now than before surgery.
I'm planning a trip to Hawaii in August, so will try out snorkeling and see how deep I can comfortably go.
I'd say just take it easy and if you think you might have trouble, make sure you have someone with you and take the activity in a small dose. See how you feel, since it seems like we all recover differently.
I hope this helps!