I'll be in Paris for a week and only have one full day to get away. Ideally, I'd like to take the train from Paris (in the morning) into the Loire Valley (Tours, Amboise?), pick up a bike rental and ride the path (total about 30 - 40 miles), stopping to go wine tasting (2-3 vineyards) and explore a chateaux or two. Will head back to Paris in the evening.
So, here's where I could use some help, please. What is the best town to start? And what vineyards are nearby? Are they close to the bike path? How dressed up to we need to be? Do we need reservations for wine tastings? Do we need reservations to visit the chateaux? Are there places to stop for lunch or should we bring our own picnic?
Thank you in advance for any advice you can offer.
(I'm an avid cyclist, so I'm fine riding that distance, if needed.)