There’s no part of Glacier that won’t take your breath away, so I don’t have any pointers on that regard...but there’s a kind of strip mall on the main drag going through Kalispell that has a place called “Scotty’s Bar.” Their elk and bison burgers are exquisite. They have a big sign and it’s easy to spot. My wife and I love going there. Another good Kalispell eatery is “Julies.” Locals are friendly and they’ll give directions. It’s a small place and you’ll have no trouble. I’ve got a busy summer planned and won’t get there until fall. I envy you...have fun.
Since you mentioned food.... one of our party has celiacs and that will drive most eating-out decisions. We did have some good options at Estes Park last October though.