I’ve had afib for 16 years. No tacycardia or bradycardia ever. I’ve had 2 ablations, but eventually went back to atrial flutter. I take diltiazem and metropolol.

and see if you can get guidance - sometimes the nursing staff can be the intermediary.

I had a massive saddle PE (blood clot) in my late 40s and I was worried about what it meant as far as activity. It had put a lot of pressure on the right side of my heart, so I went in for a check-up with a cardiologist I had visited for high blood pressure. 3 months after the clot I was in good shape - my heart and lungs were both functioning normally. I was still on a beta blocker for the borderline hypertension, and a blood thinner due to the severity of the clot. I took trips to the Grand Canyon and Hawaii within a few years, and eventually to Europe. It's been over 10 years for me now. I see a hematologist once a year for my thinner renewal, and I call his office if I ever have a situation where I'd hold my medicine (dental surgery, etc.). Sometimes there aren't hard and fast rules is what I've learned; because each individual person has their own issues. When I talked about returning to exercise after the clot my cardiologist advised "no problem w/exercise, but pace yourself. Do not overdue, it has only been 3 mos.". I don't know specifically about A-fib, but I wouldn't be surprised if it's similar in that you can do things, but with care. Maybe no bungee jumping!

In my blood clot group, they call it "a new normal" when we have to adjust after events like these. We can get back to previous routines, sometimes with more rest breaks.

relatively mild activity at your first arrival point to allow your body to adapt a bit when you get there. That is routine recommendations for all traveling (as an example) to Denver (5280 feet) and planning to head out to the mountains to hike, camp, ski or other (typically 6,00-10000 or more feet above sea level). You should let your cardiologist know you are planning a trip to an area with considerable altitude (Sparks, NV is about 4400 feet, but the mountains will be considerably higher) and see if they have any specific recommendations. Wearable technology that can detect your pulse oxygenation and even a run of a fib (e.g., Apple Watch) might be very helpful to you. You might discuss that with your cardiologist too as normal pulse oxygenation levels are lower than they would be at sea level. A detailed discussion can be found here: https://blog.altitudecontrol.com/beginners-guide-to-reading-an-spo2-chart-at-high-altitude/
But basic summary is that

If you are on meds specifically for atrial fibrillation control as well as other medications, you might want to check with them and/or your pharmacist for contraindications (e.g., NSAIDs, like naproxen or ibuprofen) which are commonly recommended for anyone experiencing adverse effects of altitude (like headache, dizziness, etc). Staying hydrated is especially important for those experiencing changes in altitude.

A. fib doesn't have to keep you from living your life. But do seek the information you need and inquire again if they are not telling you all that you need.

I'm glad that you are recovering well and obviously taking your health quite seriously. Best wishes!

The electro treatment worked for me for about two years, but I then relapsed. The cardiologist and I have considered repeating but feel that it would probably be another temporary fix. I'm looking into ablation surgery but medicine (currently Atenolol and Xarelto) seem to keep it under pretty good control.

For myself, I wouldn't be concerned about going to the mountains, but your body isn't the same as mine. I'd say to check with hour cardiologist if you're concerned.

It’s called Diamox and requires a prescription. See if your cardiologist thinks it would be appropriate for you.

I been dealing with a fib and then a flutter for 13 years. I’ve interacted with several people with similar dxs. I’ve gotten the straightest answers from cardiac nurses. I’ve been fed stories by fancy surgeons. From what I’ve been able to figure out these are complicated conditions which doctors try desperately to plug into various pigeon holes. I wish I could give you some solid answers because that would mean there were solid answers.
I’m less active now (80 yo), but I worked a busy, physically demanding job for 3 years and then a very active, physically demanding retirement for 6 years.
Don’t slow down until you have to (Covid slowed me down, unfortunately), find a doctor that you like and live your life.

a nurse caught it and took me to the ER. Came out with a pacemaker. Cardiologist assumed I had AFib and was wrong. In fact 3 cardiologist felt the same way. Have a monitor by my bed and it has never shown any AFib. I showed them my steps on my phone and they said that’s why I didn’t have any AFid as I was jogging and walking 12,000 steps a day.
They all agreed on one thing, keep moving.