Sure, here are some travel tips for your journey to Vancouver, Whistler, Victoria, and Banff:

Best Time to Visit:
The ideal time to visit these Canadian cities depends on your activities. For outdoor adventures like hiking and to witness the best weather, June through August are the best months. For winter sports, such as skiing or snowboarding, December to March are ideal. Keep in mind, July and August can be quite crowded with tourists.

Route and Accessibility:
Starting in Vancouver, you can take a 2-hour drive along the Sea to Sky Highway to reach Whistler. To get to Victoria, you will need to take a ferry from Vancouver. From Victoria, you can take a flight or a long drive to reach Banff.

Altitude and Acclimatization:
Banff is located at a higher altitude (roughly 1380m above sea level), and you might need a day or so to get used to it. Vancouver, Whistler, and Victoria's altitudes are at sea level, so no acclimatization is generally needed.

Accommodation and Booking:
Booking accommodation in advance is recommended, especially during the peak seasons. There's a range of accommodations available in these areas, from budget to luxury.

Clothing and Essentials:
Pack clothing based on the season and activities you'll be involved in. If you're going for winter sports, ensure to pack enough warm clothes. A good pair of shoes for hiking or comfortable walking is a must. Always carry a reusable water bottle and sunscreen.

Health and Safety:
Keep an eye on weather updates. If you plan to hike or ski, make sure you have the appropriate gear and follow safety guidelines. Carry a first aid kit and any personal medications.

Local Etiquette and Respect:
Canadians are known for their politeness. When visiting any of these cities, respect local customs and the environment. Ensure to tip at restaurants and hotels. Remember to follow the trails and guidelines while hiking or skiing to protect the local wildlife and vegetation.