Hello! It sounds like you are planning an exciting trip to Tours, Amboise, and Rouen in France. Here are some helpful travel tips for your journey.

Best Time to Visit:
The best time to visit these cities is from April to October when the weather is pleasant and conducive for sightseeing. However, for fewer crowds and cheaper accommodation, consider traveling in the spring (April to June) or fall (September to October).

Route and Accessibility:
All three cities can be easily reached by train from Paris. Tours and Amboise are in the Loire Valley, which is about a 2-hour train ride from Paris. Rouen, located in Normandy, is about a 1.5-hour train ride from Paris.

Accommodation and Booking:
A wide range of accommodations including hotels, apartments, and B&Bs are available in all three cities to cater all budget needs. To get the best deals and secure your preferred choice, it is advised to book your accommodation in advance, particularly during the peak tourist season.

Clothing and Essentials:
Pack comfortable clothing and walking shoes as you'll be doing a lot of sightseeing. Also, carry a lightweight rain jacket or umbrella as rain can be unpredictable. Don't forget your camera, chargers, travel adaptors, and any medications you may need.

Health and Safety:
France is relatively safe for tourists, but it is always recommended to take standard precautions. Keep your belongings secure, maintain a copy of your documents, and have travel insurance for unexpected situations.

Local Etiquette and Respect:
The French appreciate polite behavior. Speak in a low voice and avoid talking loudly in public. Remember to say Bonjour (Hello) and Merci (Thank you). When visiting religious landmarks, dress respectfully.