Flight
The Dayton International Airport is the best place to fly into. You could fly into Cincinnati if that is easier for you, but it is a farther drive. Cincinnati is about an hour away from Troy. The Dayton Airport offers a shuttle service to certain hotels in Dayton. For a full list, visit their website (which is linked here).
Hotel
This is the hotel that the bride's family recommends. The website has booking information as well as information about the local Troy area.
House Or Rental
The bride recommends trying Airbnb as an alternative to hotel rooms. Airbnb offers a wide variety of places to stay, from private rooms in a host's home to an entire apartment suite. Some local areas worth exploring with Airbnb include Tipp City and Piqua, which are very close to Troy.