Unless you're an avid hiker, Yellowstone is good for 3 days. One day for the north loop of the figure 8 road system, one day for the south loop and one day out to West Yellowstone and back. So, 4 nights and 3 days. There's enough time to get in a few short hikes each day. I like to stay in Canyon Village on the east side of the figure 8 center. It has several shops, a ranger facility and multiple places to eat. I wouldn't go to the trouble of moving my rig daily.
Glacier is basically 2 nights and 1 day. Really just one road through the park to cruise. Both times depend on your preferences for lollygagging and hiking. I'm a pretty efficient traveler.
