Hello! It's great to hear that you are planning a trip to Aden, Hadibu, and Qalansiyah. Here are some useful travel tips for your upcoming journey.

Best Time to Visit:
In terms of weather, the best time to visit these cities which are all located in Yemen is between October to April. The weather during this time is relatively cooler and more comfortable for sightseeing.

Route and Accessibility:
The most common route to reach Aden from most parts of the world is via a flight to Aden International Airport. From Aden, you can easily reach Hadibu and Qalansiyah by local transportation or by booking domestic flights.

Accommodation and Booking:
There are a variety of budget and premium accommodations options in these cities. It's recommended to book your accommodations in advance, particularly during the peak tourist season. Booking online would give you a wide range of options to choose from.

Clothing and Essentials:
Lightweight, breathable clothing is recommended due to the hot and dry climate. Don't forget to pack sunscreen, a hat, sunglasses, and a reusable water bottle. Modest clothing is advised as Yemen is a conservative country.

Health and Safety:
It's advisable to check with the latest travel advisories given the current instability in Yemen. Ensure you are updated with your vaccines and have a comprehensive travel insurance. Carry all requisite medicines and stay hydrated.

Local Etiquette and Respect:
Yemen is an Islamic country with a deep respect for traditions. Visitors are expected to respect local customs and etiquettes, particularly in terms of dress and conduct in public places.