Hello! It sounds like an exciting trip you have planned to Karbala, Najaf, and Kufa. Here are some helpful travel tips for your journey.

Best Time to Visit:
The best time to visit these cities is from November to April, avoiding the extreme heat of the summer months. During March, the Arbaeen Pilgrimage takes place in Karbala, which might be of interest.

Route and Accessibility:
The most common route is to fly into Baghdad International Airport and then take a car or bus to Karbala. Najaf is about an hour's drive from Karbala, and Kufa is nearby. There are also internal flights connecting these cities.

Accommodation and Booking:
There's a range of accommodations available in these cities - from budget to luxury hotels. Note that during religious festivals, hotels can be fully booked, so it's crucial to book in advance. Online booking platforms or travel agencies can be useful.

Clothing and Essentials:
Dress conservatively with loose, long clothing to respect local customs. Sunscreen, a hat, and a water bottle are must-haves due to the sunny and dry climate.

Health and Safety:
Travel insurance is recommended. Be aware of pickpocketing in crowded areas and adhere to traffic rules. As always, don't forget your regular medications if you take any.

Local Etiquette and Respect:
Respect for the religious customs and traditions of the local people is of utmost importance in these cities. Always ask for permission before taking photos in religious locations.