Altitude Sickness is my bread and butter, as a DME provider, I help a lot of ski vacationers and I'm well versed in navigating insurance reimbursement for Oxygen.
The short answer is it depends where you plan on sleeping.
At higher elevations sleep comes more difficultly, and Acute Mountain Sickness is easier to get.
If you're planning on a Frisco stay you will be much better off.
If a Breckie condo is in your plans, by all means see your doctor and talk about AMS and Oxygen treatment.
If you have proof of medical necessity(SPO2% 88% or less), you should be able to bill your insurance company, otherwise an Rx for Oxygen will get you a machine to sleep with that does mitigate the effects of altitude. You might find that sleep actually brings rest with Oxygen, and generally you will be fine during the day.
Alternatively, a hyperbaric chamber helps too.
I find the biggest demograph for my services is the indestructibles(in-shape male 25-40) otherwise AMS is completely random. I do find less clients who are out of shape and overweight. I think general unfitness leads to heavy breathing that keeps one's SPO2% in a reasonable range.
Diamox taken two days prior to arrival seems to help. you can also plan on avoiding first day alcohol and rich meals, those require a lot of Oxygen to digest. And drink a lot of water frequently, pee clear and you will feel better.