In reply to bigrob:
Not off the top of my head, because I haven't had the Tirol Snowcard for many years. I now buy the Salzburgsuperskicard, because of where I live.
There are some resorts on there which allow van parking, but that doesn't really help you.
Oh hang on, you can park at Konigsleiten just outside the lift station car park, which I think is on the Tirol Snowcard.
For the Oeztal valley, there is a really nice camping at Langenfeld, but that is around 30 euro/night. In Mayrhofen, you used to be able to camp outside the paragliding place for about a tenner a night with showers and toilets.