The easiest way to reach Loire is by train from Paris. There are high-speed trains that depart from Paris Montparnasse station and arrive at Saint-Pierre-des-Corps, a town located near Tours. The journey takes around 1.5 hours and costs €15-35 one way. Once in the region, it's recommended to rent a car as public transportation options are limited. Car rental prices range from €30-50 per day.
If you have more time, consider adding visits to other notable castles in the region, such as Château de Cheverny and Château d'Amboise. If you have less time, focus on one or two castles and spend more time exploring the local villages and towns.