Hello! That sounds like an exciting trip to Tunisia. Here are some travel tips for your journey:

Best Time to Visit:
The best time to visit Nabeul, Mornag, Grombalia in Tunisia is in the spring (April to June) and autumn (September to November). During these times, the weather is comfortable and perfect for sightseeing.

Route and Accessibility:
The easiest way to reach your destinations is flying into the Tunis-Carthage International Airport in Tunisia. From there, you can take a taxi or rent a car to Nabeul. Similarly, Mornag and Grombalia are nearby and can be reached by car/taxi.

Accommodation and Booking:
You can find a variety of accommodations in Nabeul, Mornag, and Grombalia, from budget to luxury. Booking through reputable travel websites is advisable. It's always best to book your accommodation as early as possible, especially during the peak travel seasons.

Clothing and Essentials:
Light, breathable clothing is recommended for the daytime. Don't forget to pack a hat, some sunscreen, and a good pair of walking shoes. Carry a light jumper or sweater for the cooler evenings. Tunisia is a majority-Muslim country, so please ensure that your clothing respects local customs, particularly when visiting religious sites.

Health and Safety:
It is recommended to get travel insurance for your trip. Drinking only bottled water and avoiding raw and street food can help prevent any potential stomach upsets. Tunisia is generally safe, but as with any tourist destination, be aware of your surroundings and keep your valuables secure.

Local Etiquette and Respect:
Tunisians are known for being polite and hospitable. When visiting religious sites, dress modestly and avoid disrupting worshippers. Familiarize yourself with a few basic Arabic phrases as a sign of respect towards the local culture.