The high temperature at ASE is forecast to be 27 degrees C all week (81F). According to an airport analysis (by APG), taking off to the north the 31a is good for 15112 pounds.

If the airplane has an 11,000 lb empty weight, 5 pax for roughly 1000 lbs, and say 200 lbs of bags, that puts us at 12,200. That leaves almost 3000 lbs for fuel just to hop over to Junction.

Looks like as long as your hubby has the alternate DP for Aspen provided by one of the airport analysis providers he should be in good shape!