What is the most important thing in the Tour du Mont Blanc hike after you have decided on the route, planned all the stops and dates, booked accommodation and thought that all set? Of course your backpack. It is important to always remember that the details are very important, so don't take this too lightly.
First rule: whatever you put in your backpack, you will carry on your back. If you don't want to suffer throughout the trekking, then you should seriously approach the packing process.
The second important rule: take with you only what is necessary and especially light. If it is possible to replace a heavy thing with a lighter analogue, then do not neglect it. You will remember this on one of the cliff climbs and thank yourself. Spending 6-9 hours on the trail with long distances, high ascents and sharp descents every extra gram will feel like a 100 kilogram stone.
Yes, of course, if you decide to use the luggage transfer service, as do some Tour du Mont Blanc hikers, then your list of things can be more solid and luxurious. In such cases, you will have one bag that will be delivered to your accommodation by transfer company, and you will have to carry with you only a day backpack. However here it is also important to remember that some accommodations are located in areas without vehicle access due to the high altitude, the complexity of the route and the accessibility, so on some days you will need to pack your day backpack with things for the overnight stay. Another point not in favor of the transfer is its cost, such services are not cheap and can significantly increase the budget of your trip.