Sure! Visiting Rabat, Fes and Marrakech will give you a diverse experience of cultural richness in Morocco. Here are some travel tips for an enjoyable experience.

Best Time to Visit:
The best time to visit these Moroccan cities if you wish to enjoy moderate temperatures is during the Spring (March to May) and Fall (September to November).

Route and Accessibility:
Most international flights land in Casablanca. From there, you can take a domestic flight or a train to Rabat, Fes, or Marrakech. Trains and buses are also a common way of intercity travel within Morocco.

Altitude and Acclimatization:
These are low-altitude, larger urban areas so altitude sickness isn't a common issue. However, staying hydrated always helps.

Accommodation and Booking:
Accommodations in these cities range from boutique "Riads" (traditional Moroccan houses) to luxury hotels. Booking early in high-season is advisable. For a special experience, try staying in Medina (old town) to enjoy the rich heritage.

Clothing and Essentials:
Morocco has a mix of temperatures - warm days and chilly nights. Light, breathable clothing for day and additional layers for evenings would work best. Women might want to dress modestly as Morocco is a Muslim-majority country. Comfortable shoes are must for exploring Medinas because they are often cobbled and hilly.

Health and Safety:
Moroccan cities are generally safe but it's always wise to stay vigilant, especially in crowded tourist areas due to pickpockets. Tap water isn’t recommended for drinking; it's safer to stick to bottled water.

Local Etiquette and Respect:
Respect for local traditions is important. Avoid photographing locals without their permission. During Ramadan, you should avoid eating, drinking or smoking in public during the day out of respect for local customs.