Stillwater is a nice campground. I prefer the campground on the Arapahoe arm of Granby, but the last time I was there many of the spots were tricky to get in with all the trees.
I regard to the drive, if you go west on Friday or east on Sunday, expect a lot of traffic.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010