i would compare the drive from gunnison to breck or key to the drive from boulder/denver to those resorts.  even tho the mileage is longer, there is rarely any other traffic along highways 50/285/92 between gunnison and summit county, so the time spent driving is really similar to i70 on the weekends.
my advice: if next year is a good snow year at cb, you wont want to be skiing park anyways.
after skiing cb nearly my whole life, park is pretty boring in comparison, even at key or breck