You are going to have a great time and now is the time to be thinking of booking (they sell out as season is short) and making travel plans
Personally I think you cannot beat an all inclusive Alps trip, guiding, uplift options inc private vans which mean you’ll ride trails you’d probably never find and ride up in a van instead of 100’s meters of climbing, food, drink, company !
I’ll jump in with some names of companies popular on here with STWers a number of whom the owners post regularly. Two I have used amd any of these I’d be happy to book with
Trail Addiction – main base in Les Arcs area and also run trips to Areches Beaufort (which I have done, really excellent and we saw only a handful of other rider all week)
White Room Chalet – based across the valley from Les Arcs and ride a wide variety of areas in the Isere valley and into Italy, I’ve skied with them excellently run and regular poster
Bike Verbier – long established, very popular and highly recommended
Basque-MTB different region, away from traditional “The Alps” longer season as a result. Regular poster and a company we are looking at for next year as a change
Sierra-MTB something a bit different again
Bike Riviera – Italian location near the coast so a different sort of holiday. I met the founder on a Nirvana Cycles (Surrey Hilsl)shop ride and she was delightful and locatiion is popular with the shop and customers
Have a good look at websites I think any of these you can’t go wrong