Hello! That sounds like an exciting trip you're planning. These cities in Rajasthan, India are rich in history and culture. Here are some tips to help in your journey:

Best Time to Visit:
The ideal time to visit Rajasthan, which includes Ajmer, Jaipur, and Jaisalmer, is during the cooler months from October to March. It's less rainy and the temperatures are more bearable, thus enabling you to enjoy sightseeing to the fullest.

Route and Accessibility:
All three cities are well connected by road, train, and air. Start your journey from Ajmer, then proceed to Jaipur, followed by Jaisalmer. There are daily flights to and from Jaipur, and regular trains and buses operate between these cities.

Accommodation and Booking:
There is a variety of accommodations available in all these cities ranging from budget hotels to luxury resorts. It's advisable to book your accommodations in advance, especially during peak tourist season, to avoid high prices and unavailability.

Clothing and Essentials:
Since Rajasthan is known for its hot climate, light, breathable clothing is recommended. Don't forget your sunglasses, sunblock, and hats. Do pack some warm clothes if you are visiting in the winter as the nights can get chilly.

Health and Safety:
Stay hydrated and take precautions against the sun. Avoid drinking tap water and always go for bottled water. As in all travel circumstances, keep an eye on your belongings and watch out for pickpockets in crowded places.

Local Etiquette and Respect:
Rajasthan is steeped in tradition. In holy places, remove your shoes and respect the customs. Dress modestly, particularly in religious sites. Always ask permission before photographing people.