Sure! Hammamet, Sousse, and Mahdia are stunning destinations in Tunisia with beautiful beaches, historical sites, and bazaars. Here are some travel tips for your journey:

Best Time to Visit:
April to June and September to November are the best months to visit these places due to mild weather conditions. Avoid the summer months (July & August) if high temperatures are not your preference.

Route and Accessibility:
Tunisia's transportation system is well-developed and these cities can be easily reached by trains or buses from the capital, Tunis. In case you prefer to drive, rental cars are readily available.

Altitude and Acclimatization:
These cities are located at sea level, so acclimatization shouldn't be a concern.

Accommodation and Booking:
You can find multiple hotels and guest houses ranging from luxury resorts to budget accommodations. It's recommended to book in advance for the best options, particularly during peak tourist season.

Clothing and Essentials:
Lightweight clothes are suitable for daytime, but it's wise to carry warmer clothes for the cooler evenings. Don't forget a good pair of walking shoes, sunblock, and hats for protection against the sun.

Health and Safety:
Make sure you have comprehensive travel insurance. Though Tunisia is generally safe, like any other place, it's important to be vigilant. Also, remember to maintain hydration levels due to the warm climate.

Local Etiquette and Respect:
Tunisians are warm and welcoming people. It's respectful to dress modestly, especially while visiting religious sites. Arabic is the main language, though French is also widely spoken. A few basic phrases in Arabic may help in interacting with locals. Remember to bargain in the markets, it's part of the culture!