What a great opportunity. I am quite familiar with most of Brittany. Rochefort-en-Terre is in a beautiful area, and the chateau is spectacular. I've only been there once, as most of my time in Brittany has been spent in the north (Le Tregor), the far west (Finisterre), and the plumb middle (Carhaix).

Brittany is my favorite part of France, and of the world, really. My first ever bicycling trip was a through Brittany when I was 15 years old, and that sealed the deal. I always thought I would end up living there, but so far it has not panned out. So far .

If I were you, I'd get a detailed Michelin map and just meander the roads that are yellow and white on the map. You'll end up discovering hidden villages and lost country roads. I'm envious of you!

Although I have traveled to Brittany countless times, I have only brought my bike twice. Once was when I was 15, and once was about a year ago. The other times I did not ride because I was traveling with and visiting family members who did not ride. These days, however, I bring my bike whenever I go. Of course, I have a folding bike so that makes things easier.

When I lived in an area north of Bordeaux (Charentes-Maritimes) for a few months, I rented a 3-speed bike and took it on long rides, up to 50 miles. I was not speedy on that bike, but speed was not my intent. That was 15 years ago, so I bet local bike shops have a better selection now. You might want to see if there are rentals in Vannes, which is the closest larger city to Rochefort-en-Terre.

Of course, you could just bring your own bike. The airlines will charge upwards of $100+ each way extra for the bike, and you should keep your box for the return trip. Either way, you will not regret having a bike in Brittany!

Best of luck and have a wonderful time!