Here are a few threads on the issue:
http://texags.com/main/forum.reply.asp?forum_id=34&topic_id=1147109http://texags.com/main/forum.reply.asp?forum_id=54&topic_id=1143650This is only my opinion, which comes from 3 years of being a backcountry ranger for this park, so I consider myself lucky to have seen what I have seen thus far. For me, I would either do Many Glacier or Two Medicine for the day since you are already on the East Side. Both offer great things to see and do. You cannot go wrong with driving the Sun Road, but keep in mind that it takes a LONG time to drive. If you are wanting to hike, I would skip the Road and just concentrate on the two I mentioned. There are numerous small hikes you could do at each one to give you some great shots of the park.
However, if you decide to drive the road, I would not venture too far past Logan's Pass, as I would not waste that short of time in a car. I would possibly hike up to Preston Park just past St Mary, giving you a great view of Peigan Glacier and Jackson Glacier. This is 3 miles round trip and gain an elevation of around 1000 feet if I remember correct. If you only want to drive a short ways into the park, you can drive about 3 miles into it and catch a great shot of St Mary Lake. There is a good chance of seeing a bear at the alluvial fans just east of the campground during 10am-2pm. ALso, bears like to hang out at the avalanche path just west of the campground. This is a quick, one hour detour you could make on your way to or from Many glacier from two medicine.
Another good hike would be Scenic Point at Two Medicine. 3.5 miles roundtrip, giving you a fantastic 300 degree view of the entire park and into Canada. A good hike at Many Glacier would be Grinnel Glacier.
I would eat your meals at the Park Cafe and Two Sisters, just north of St Mary. Both are frequent spots on the TV Show, Diners Drive ins and Dives.
[This message has been edited by Vero143 (edited 8/1/2008 7:21a).]