The GC makes a good day trip for us, we stay for us at Ft Tuthill a military campground in flagstaff. As noted above there are many areas to day trip out of flagstaff. Williams has an air museum we have never been to yet and that is on the way in/out of the canyon depending on route of entry/exit. many smaller places to visit as noted plus you can also day trip to sedona to the south about 50 miles, jerome any number of places and it will probably be a lot cheaper than in the park I dont know for sure. We have stayed at the KOA in flagstaff and it was very nice. get with the tourist burea here in AZ and request the state campground stuff as they will also list the tourist spots to visit. Monument valley is ok but you will stay at mexican hat I think it is. Utah has some very pretty state campgrounds we will visit, Kodachrome and Gobblin parks are the main ones and the rates are cheap.