Sure! Visiting Trujillo, Chiclayo, and Cajamarca in Peru will give you deep insight into the admirable ancient history and rich culture of the region. Here are some travel tips for your trip:

Best Time to Visit:
The ideal time to visit these cities is during the dry season, from May to November when the weather is pleasant.

Route and Accessibility:
Trujillo and Chiclayo are connected by a short bus journey while Cajamarca is around 7-8 hours away by bus from either city. There are also flights from major cities in Peru to these locations.

Altitude and Acclimatization:
These cities are situated at a relatively low altitude, therefore acclimatization is not a significant concern. Still, take it easy for the first few days, staying hydrated and not over-exerting yourself.

Accommodation and Booking:
The cities have a wide range of accommodation available from budget to luxury. Hotels and guesthouses can be booked online, however, it's recommended to do it in advance, especially during the peak travel season.

Clothing and Essentials:
Pack lightweight clothing for the warm days and layers for the cooler, windy evenings. A good pair of walking shoes is needed for exploring the archaeological sites. Also, don’t forget your sunscreen, hat and sunglasses for protection against the sun.

Health and Safety:
Carry a basic first-aid kit, medication for common ailments like diarrhea, and insect repellent. Stay hydrated, especially during long day trips. Always eat at clean, reputable places to avoid foodborne illnesses.

Local Etiquette and Respect:
When visiting religious or historical sites, please behave respectfully. Dress modestly, particularly in remote, rural areas and when visiting religious sites. Learn some basic Spanish phrases as it will help in interacting with the locals.