We will organise a pick-up on Saturday at 3:30 pm from the Tours TGV Train station. So the easiest way might be to get to Tours station at least 15 minutes before that time.
The train from Paris Montparnasse to Tours takes about 1h and 15 minutes. Just be aware that some of the ways to get to Tours might suggest a change in a station near Tours called Saint-Pierre des Cors. you do not really want to do this; just opt for a direct train.
If you can not arrive at such a time that the pick-up we organise will not work for you, please note that there are taxi stands at the station. And Uber drivers are available in Tours as well.
You will not need a car to participate to any of the activities we have planned for you. This means not for any meal or excursion or to lounge around the pool. If you still decide to rent a car, you should plan to do so in Tours as you will not find a rental place in Langeais. And we will of course be happy to provide you directions on how to get to us.