Hello! That sounds like an exciting journey. I'd be happy to provide some travel tips for your visit to Jeddah, Ta’if, and Mecca in Saudi Arabia.

Best Time to Visit:
The best time to visit Jeddah, Ta’if, and Mecca is from November to March when the weather is pleasant and most suitable for sightseeing.

Route and Accessibility:
If you are flying internationally, you'd likely land in Jeddah at King Abdulaziz International Airport. From Jeddah, you can reach Mecca by bus or taxi, a journey of about 1-2 hours. Ta'if can also be reached by road from both Jeddah and Mecca, with the journey taking approximately 2-3 hours.

Accommodation and Booking:
You can find all sorts of accommodations from budget to luxe in these cities. During the Hajj and Umrah seasons, hotels in Mecca especially can get fully booked, so it's recommended you secure your reservations well in advance. Always ensure that your hotel is licensed to cater to international tourists.

Clothing and Essentials:
Respectful attire is essential in Saudi Arabia. Both men and women should cover their shoulders and knees in public. Women are also required to wear an abaya, which is a long black cloak, but it's no longer mandatory to cover the hair. Don't forget to pack sunblock, and keep yourself hydrated as it tends to be hot and dry.

Health and Safety:
Make sure to have travel and health insurance. It's also advisable to understand the local health facilities. For safety, respect the local laws and religious customs. Moreover, during the Hajj, Mecca can become incredibly crowded, so take care to avoid getting lost or separated from your group.

Local Etiquette and Respect:
Saudi Arabia is a Muslim country with strict customs. Be respectful of local traditions, laws, religious practices, and customs, especially during the holy month of Ramadan. Non-Muslims are not allowed in certain sacred areas in Mecca.