I prefer driving as less hassle with packing the bike up and less chance of damage plus ability to take more of what you want. Good option for three of you assuming you have a suitable car given the amount of stuff you’ll have. Also having a car gives you more flexibility for exploring and/or doing two different areas.
IMO the easiest destination is Portes du Soleil – Morzine/Les Gets – lots of marked trails, lots of off piste to discover (plenty of threads on here), good lift system. Nearby resorts of Samoens and Chamonix and Verbier are not that far for a two centre holiday
If you have the budget for a guided all inclusive holiday look very seriously at those, i think they are great value when you consider everything you get inc guiding, food and booze. You will ride trails you’d likely never find on your own. Downside is that its late to be booking now, many will be sold out.