Make sure to pick up a map at the Visitor Center or when you go through the entrance.
Visit the National Park Service website for the most up-to-date information on entrance passes.
You can use this itinerary as the basis for planning your perfect trip to Grand Teton National Park.
My first suggestion is always going to be to stop at a Visitor Center as soon in your itinerary as is practical.
The chapel is open for you to go in, but it is still a functioning church.