Absolutely! Your trip to Interlaken, Lucerne, and Adelboden in Switzerland sounds like an exciting adventure. Here are some travel tips that will come in handy:

Best Time to Visit:
Interlaken and Lucerne can be visited any time of the year depending on your preferences. Winter (December to February) is ideal for winter sports. Spring (from April to June) and autumn (from September to October) are perfect for sightseeing and hiking. Summer (July to August) is the busiest season due to school holidays.
Adelboden is a typical winter destination, best between December and March, but it's also beautiful in summer for hiking and mountain biking.

Route and Accessibility:
International flights often land in Zurich or Geneva, from where you can take a train to Interlaken or Lucerne. Train connectivity within Switzerland is top-notch, so reaching these destinations won't be a problem.
Use Swiss Travel Pass for unlimited train, bus, and boat travel across the country.

Altitude and Acclimatization:
Altitude sickness isn't a major concern in these destinations. However, if you're planning to go up the mountains (like Jungfrau in Interlaken), make sure to take it slow and allow your body to adjust to the altitude.

Accommodation and Booking:
Both budget and luxurious accommodations are available in these cities. It's recommended to book your hotels in advance if you’re traveling in peak season.

Clothing and Essentials:
For winter, pack heavy, warm clothing, including a good quality jacket, boots, gloves, and a hat. For summer, light clothing works, but carry a jacket for cooler evenings.
Remember to pack proper hiking gear if you plan to explore the mountains.

Health and Safety:
Pack a basic first-aid kit. Tap water is generally safe to drink in Switzerland, and public transportation is reliable and safe.

Local Etiquette and Respect:
Swiss are generally formal and punctual. Be respectful of this. When hiking, do not litter and keep noise levels low to respect the peace of nature. When eating out, it's customary to tip by rounding up to the nearest Franc.