Hi there - I'm not a WP parent (son is a 1st class at Kings Point this year) but we live about 1-plus hours north of WP and have gone to a number of games. I'm assuming you're renting a car at the airport and driving? The one "don't miss" I always recommend for folks going to Army games is to arrive early on Saturday to go to the cadet review. It's really impressive.
We have tickets for the Stony Brook game on Sept. 29 and the review is at 9:00 a.m. It looks like your game is at 12, so the review likely is also at 9. If you ordered tickets online, it should be listed.
Another suggestion: Make sure you get up to Michie Stadium in plenty of time for the game. The security is tight - last time we went, we missed the kickoff.
The stadium is walkable from the parking areas, but it's uphill. They do run shuttle buses.
WP has a beautiful campus. You'll love the view of the Hudson River. As you look north, you'll see Storm King Mountain to your left. If you're into adventurous driving, take NYS Route 218 through Cornwall on the way back to Fishkill - it wraps around Storm King and has amazing views - that is, if you dare take your eyes off the road
. (Passengers will enjoy the view, though.)