Sure! Here are some travel tips for your trip to Lima, Trujillo, and Cajamarca in Peru:

Best Time to Visit:
The best time to visit these cities would be during Peru's dry season, which typically runs from May to October. Between June to August is the most crowded period due to local holidays, you may want to avoid this time if you prefer less crowded places.

Route and Accessibility:
Lima is easily accessible by flights. From Lima, you can take a flight or a bus to Trujillo and then proceed to Cajamarca. Flying offers a quicker but more expensive option than taking bus rides.

Altitude and Acclimatization:
Unlike some other cities in Peru, Lima, Trujillo, and Cajamarca are not at very high altitudes so acclimatization is generally not necessary. However, it's always wise to take it easy the first day or two.

Accommodation and Booking:
There are plenty of hotels and guesthouses in these cities, but it's advisable to book your accommodation in advance especially if you're traveling in peak season.

Clothing and Essentials:
Pack for a variety of weather conditions. The coastal city of Lima is often nebulous and cool, so a light jacket or sweater is advisable. Inland cities such as Cajamarca can have a wider temperature range from day to night. Also, don't forget to bring sunscreen, shades, comfortable shoes for walking, and a good camera to capture the beauty of Peru.

Health and Safety:
Ensure to drink plenty of bottled water to stay hydrated, and be cautious of where you eat - street food can be delicious but sanitary conditions can vary. You should have travel insurance covering health issues.

Local Etiquette and Respect:
Peruvians are warm and welcoming. However, respect the local culture and costumes. When visiting archaeological sites or other places of historic significance, it is important to respect all rules and regulations.

Remember to take your time and soak in the rich cultural history of these beautiful Peruvian cities!