Flight
This airport is right in Grand Rapids, and within driving distance of the wedding reception/ceremony.
Rental Car
This is the website for ground transportation at the Gerald R Ford Airport. There are ~5 companies you can book through, if you need to rent a car (click "View" below).
Hotel
Standard King and Double Queen rooms have been blocked for June 18-20. If you would like to book with this hotel, CALL using the number above and let them know you are booking for the Devon & Erik Wedding Weekend June 18-20. If you need extra days or less days than June 18-20, they can adjust for this over the phone, but not over the website so it is important you call when you book. They have adjusted the rates, so king rooms are ~$92 per night, double queens are ~$97 per night.