I'm travelling from the UK to Chambery on 12th May this year and I have two empty seats in my van. I'm leaving from the NE of Scotland so it's only a few minutes different to go via the A1 or the M6, so can pick people up from a variety of places.
I would be able to drop people off in places up to 1 or 2 hours away from Chambery (Chamonix, Geneva, Lyon, Grenoble, etc.) if they paid a bit extra for the detour.
I've got space for all the luggage you could possibly carry.