Mont Saint-Michel is very far away from Paris. It is very convenient to join the tour. The round-trip drive takes about 4-5 hours. You will stop at a rest stop along the way and you can go to the toilet to buy something to eat. You will arrive at Mont-Saint-Michel at about 12 o'clock. Around 16:15, you have to go back to the parking lot to gather and get on the bus. From the parking lot to Mont Saint-Michel, you need to take the shuttle bus. There are many people queuing up on the return trip. There will be a bus in about 5 minutes. It is recommended to reserve 20-30 minutes for queuing. By car, the scenery of Mont Saint-Michel is very beautiful, and you can have an unobstructed view from the top observation deck. However, the tour bus broke down on the way back, so you had to sit in a park and wait for the travel company to arrange it. The travel company's arrangements were very poor, and it was a long wait. It took 4 hours for another tour bus to take me back to Paris. It was already 2:15 local morning when I got back to Paris. I applied for a full refund but only a small amount was refunded. It was a bad experience this time.