If it were my call to make I would try to get the team in Denver a day earlier to get a bit more acclimated to the thinner air. I'm sure they would find a facility to workout in. Just an ideal lol
Wouldn't make a difference. When I moved to Denver over 30 years ago, I remember feeling like crap for about 2 weeks until I finally started to acclimate.
Now I'm no NFL athlete in peak condition, but I was only 19 at the time. The high altitude is what gives Denver an advantage not only at home but on road games as well.
I come down to Texas twice a year to visit family, and my brother that's 27 yrs old and works out on a regular basis always want me to go running with him.
I always leave him puffing on the trail, and I rarely even jog in Denver anymore.
What I'm saying is that living in the high altitude gives you an advantage, gives you a tolerance to having less oxygen, maybe marginal, but you can feel the difference.