Got here on a Monday at about 1pm.
There were about 3-4 sites available, 2 of which could fit a camper. We grabbed one. It could fit a 20-25' camper with vehicle at most.
The place emptied out pretty well mid week (peak season).
Pros:
Many sites
Some flat/level sites
Some very big sites (2-3 could probably fit a larger 30'+ rig)
Very quiet
15 min to west glacier entrance gate
Clean
Full 5 bar Tmobile
Cons:
Not much for turn around space, especially for a larger rig. If sites at end of road are packed you may be up a creek.
Weekends it's packed. Still quiet, just nit much availability.
No water. The spigot that used to be available outside the park gates are no longer available. Closest water is inside the park at the picnic areas.
We stayed 6 nights and it was great. Very quiet, and an easy 25 minute drive to Columbia falls for grocery. 15-20 to hungry horse for gas.