Surely, here are some travel tips to make your trip to Mogadishu, Barawe, Kismayo smooth:

Best Time to Visit:
The best time to visit Somalia generally is during the dry season, from December through March, when temperatures are lower and conditions are less humid.

Route and Accessibility:
You can fly into Mogadishu, and from there, you have two main routes to Barawe and Kismayo; by road or by air. While traveling by road could offer more scenic views, it's also riskier due to the condition of some roads and security concerns. You might want to consider domestic flights or a reliable travel tour operator for convenience and safety.

Altitude and Acclimatization:
Mogadishu, Barawe, and Kismayo are at sea level, so you don't have to worry about altitude sickness. Nevertheless, it's important to take it slow, especially under high temperatures.

Accommodation and Booking:
There are several hotels in all three cities, but it's highly recommended to book your accommodations in advance. Some hotels also offer airport pick-up services, which may be helpful.

Clothing and Essentials:
Light, breathable clothing is recommended due to the generally hot and humid climate. However, it's important to dress modestly to respect local customs. Don't forget your sunblock, sunglasses, and a hat.

Health and Safety:
Somalia has some specific health hazards, including Malaria. It's recommended to take precautions like using mosquito repellents and taking antimalarials. Ensure that your regular vaccines are up to date and consider getting travel vaccines. It's also recommended to drink bottled water.

Local Etiquette and Respect:
Somalia is an Islamic country, so show respect for local customs and traditions. Women are expected to dress modestly, and it’s polite to ask permission before photographing people.

Please note, it's important to keep an eye on the local politico-security situation through local news and your embassy updates due to the ongoing conflict in the region. You may also want to consider hiring a local guide or going with a group tour for safety reasons.