In reply to birbeck: Hi Andy,
I've done a couple of trips to Tignes over the last couple of summers and there's a good range of stuff there from the downhill through to very enjoyable all mountain and cross country routes, there's a range of grades but majority of it was pretty accessible. They were doing free lift passes as well so the lift assist approach could work to getting a fair bit of trail.
Also when we were there accomodation was pretty cheap at 25 euros a night for a tiny ski appartment for four.