As a GA pilot in France, it is best to speak a little French. Small airports are usually “French only” and often only “air to air” communication. We called ahead of time, and runway 24 was in use. Handy to be briefed in advance!

After landing, we rented a car from: https://www.ulocation.com/accueil/contact/nos-magasins/56-morbihan/super-u-belle-ile-en-mer.html

U-location can provide a shuttle to pick you up at the airport. You can then choose a car from them. Just give them a call

Hotels we stayed at:
https://www.hotel-la-desirade.com/ (Close to airport, AND with pool)
https://www.hotel-leclosfleuri.com/?gad_source=1&gad_campaignid=12888599666

Restaurants, which we “tested”:
https://www.lapetitetable.fr/#le-restaurant
http://www.hotel-restaurant-belle-ile.fr/

An organic bakery for delicious coffee, breakfast and fresh artisan bread: Maison Guerveur in Sauzon (no website found): https://maps.app.goo.gl/oymzyXtH4i97PrrG8?g_st=ic