Arapahoe Basin is less crowded on weekends and it's only a few miles from Dillon, which is where Keystone is. Breckenridge is a short drive from there as well. I've stayed at the Super 8 in Dillon a few times. It's not a 4 or 5 star, but it's got free breakfast and it'll do the job for one dude traveling alone.
Super 8 Dillon/Breckenridge Area | Dillon, CO *80435-0829 Hotel