Hello, it's great to hear that you are planning a trip to Abha, Tanumah and Najran. Here are some tips to facilitate your travel planning.

Best Time to Visit:
The best time to visit these cities in Saudi Arabia is from November to March when the weather is pleasant. However, Abha's climate remains relatively cool throughout the year due to its higher altitude.

Route and Accessibility:
All the three cities are well connected by road and air. You can fly to Abha through Abha International airport, then you can take a car or taxi to Tanumah and Najran. A direct bus service also connects Abha and Najran.

Accommodation and Booking:
There are a range of hotels available, from luxury to budget options. For the best prices and accommodation selection, it is advisable to book in advance using reputable booking platforms online.

Clothing and Essentials:
As Saudi Arabia is a conservative country, modest clothing is recommended for both men and women. The climate can fluctuate, so layering is a good option. Do not forget to pack a sunhat, sunscreen, good walking shoes and a reusable water bottle.

Health and Safety:
Healthcare facilities in these cities are good. However, it's recommended to have travel insurance that covers healthcare. Also, the tap water in Saudi Arabia is safe to drink, but if you prefer, you can always buy bottled water.

Local Etiquette and Respect:
Saudi Arabia is a Muslim country, so respect their customs and rules. Avoid eating, drinking, or smoking in public during Ramadan. Always ask for permission before taking photos of people. Women are advised to cover their hair and avoid wearing tight or revealing clothing.