Can't really comment on tubeless as I've never ridden tubeless in the Alps. I deliberateed over it this year because we were riding the Pass Porte Du Soleil and it's a long day out with plenty of actual pedaling so you feel extra weight,but in the end, it was just simpler to go with tubes.
I've ridden in the Alps probably about a dozen times. For sure there are people who done far more than I have but they seem to be keeping quiet so I thought I'd help. I've always stayed in Chalets; too old for camping now! But you should really think about keeping your bike secure if you are camping.
Other tips, again depends on what your preferred style of riding is. Are you on a DH bike or an AM/trail bike?
It's easy to get to Les Gets from the top of the Plenny Lift and at the end of a hot day, a swim in the lake is wonderful. It costs a few Euros.
Potence is a meat and rice dish that's very good.
As you have transport you should also spend a day in Chamonix, especially if you're more into trail like DH than man made DH courses. Take the lift to the top of La Flegere and then follow the trails down to the valley floor again; they are the best I've ever ridden. Also Le Grand Monte is supposed to be awesome.