Another vote for BPW. However; I don’t know anything about your riding experience or skill level so feel free to ignore this but if you are not 100% comfortable with the idea of BPW then look at the half day coaching courses. These don’t cost much more than a days uplift and include a full day pass. So a mornings coaching on the trails and an afternoon riding what you want.
I’ve just come back from a trip to Les Gets. It’s excellent. I was on a FlareMax which was fine, did not use any body armour, but with a bigger bike it might be a good idea – there were a few injured people around so it’s worth considering.