If you are taking your boat take along about 300 ft of anchor line. This time of year the north end of the lake is the best for lakers. It's easier to anchor than trying to stay on your spot with a trolling motor, they tend to stack up so when you find them it can get fun. Ice melt is coming into the lake from the Flathead River and you need to fish the mud line. I've used cut bait just off the bottom on a 2 to 3 oz jig with a 3 or 4 inch white or pink tube bait vertical jigging. Be sure to ID your fish right, keeping a bull trout can cost you some cash in fines unless they have started letting people keep them. If towing a boat it's safer to go up 93 than MT 35.
OR you can go up to Lake Mary Ronan and fish for kokanee salmon, perch trout and bass. I've fished it in the winter but not the summer.
As mentioned Whitefish has lots of restaurant and shops, Whitefih Mountian has a zip lines, a alpine slid and a walk in the tree tops. Kalispell has a Cabelas Outpost and some shops downtown. Artist/ carver Jeff Fleming has his studio on Hwy 93 just a few miles south of Kalispell where he sells his original Bearfoot and Big Sky carved bears. It called the Bear Country Gallery.
Have fun.
Cliff