Oh there's stuff to do, jet ski, fish for carp, minnotonka cave is cool, the lake is beautiful for sure. Great rasperry shakes all over in garden city, there's neat little trail you can take your kids on at the top of the summit, I believe it's called lone pine? It's right off the highway, pretty popular hike. You might could find some bow-fishing, I've never done it but there are a fair amount of carp in the lake. There's 2 golf courses.
Like was mentioned above you'll get credit with the wife. I drove to Cokeville from Logan to meet my wife's family and then up to Idaho Falls for more family "fun" and then back to Logan in time to get up for work today, So I know what you're going through.