I'm going east-to-west and was planning to camp at the Rising Sun Campground. I don't think I'll make it from Rising Sun to Sprague Creek Campground by 11 am. It looks to be a challenging 34 miles, and I don't want to rush it because I know how beautiful that stretch is. I had planned to end up the day in Columbia Falls, but maybe I'll just hang out at Sprague Creek Campground or Lake McDonald Lodge and pedal the last hour down to West Glacier after the road re-opens at 4 pm.
That sounds like a plan. Rising Sun is a good place to start from. IIRC, it's only 2000' of climbing from there to Logan Pass. Then it's all down hill. That's what we planned to do in '09, but when we got to St. Mary we were told the pass would not be crossable the next day. We had a fixed flight home, so in order to see at least some of the west side, we stayed at St. Mary and then rode nearly 100 miles around the park, via Looking Glass Hill and Marias Pass, to Sprague Creek. The next day they opened the west side all the way to the pass so we got to go up and back down.
If enough snow has melted, I recommend taking the relatively short hike to the viewing platform overlooking Hidden Lake that starts behind the Logan Pass visitor center.
Sprague Creek is along the lake and has a day use picnic area. This place in W. Glacier offers hiker/biker camping in an open area for only $10:http://www.glaciercampground.com/
Stayed there before the start of a backpack trip. Nice for $10, and it's set back from the road so it's quiet.
The market in W. Glacier, while not huge, has a decent grocery supply if you will be cooking. The pancakes at the Glacier Highland Restaurant on U.S. just east of GTS Road were pretty darn good.
Definitely follow the map proper getting to Columbia Falls due to the shoulderless section of U.S. 2 in/near Hungry Horse. The unpaved portion (Belton Stage/Blankenship) can be washboardy in places, but it's really nice back there, except for the occasional vehicle associated with rafting operations. Keep your eyes peeled for bears!