Sure! Here are some travel tips for Marrakech, Fes, and Meknes:

Best Time to Visit:
The best times to visit Morocco is during spring (April to June) or during fall (September to October) during which the country is not too hot.

Route and Accessibility:
Marrakech, Fes, and Meknes are all well-connected cities in Morocco. The rail network in Morocco is very extensive and reliable. You can easily get a train from Marrakech to Fes, and Fes to Meknes.

Altitude and Acclimatization:
These cities are at low altitude, so acclimatization is not an issue. However, Hydration is essential due to the prevalent dry climate.

Accommodation and Booking:
Pre-book your accommodations. There are countless options for all budgets in each of these cities, from luxury hotels to hostels and riads (traditional Moroccan houses often converted into hotels).

Clothing and Essentials:
Pack lightweight, breathable clothes. Morocco is a Muslim country, so dress modestly to respect local culture, especially in religious places. Hats, sunscreen, and sunglasses are recommended to protect against the sun.

Health and Safety:
Ensure you have travel insurance and keep emergency numbers noted. Avoid drinking tap water, stick to bottled water and be cautious of street food.

Local Etiquette and Respect:
When visiting places of worship, dress appropriately and observe silence. Ask for permission before taking photographs of locals. Bargaining is a part of shopping culture in Moroccan markets so don't be afraid to negotiate.

Lastly, with the ongoing COVID-19 pandemic, please ensure to follow all health and safety guidelines issued by authorities such as wearing masks, maintaining social distancing, and frequently sanitizing hands.