In reply to Bobbirks95:
I live in Inverness so it's only 30 miles for me. I use my campervan often but there are multiple places to stay in Aviemore.
Closer to the slopes and at the bus stop (which beats the trafic) is CairnGorm Lodge, the youth hostel. Glenmore Lodge is also about 10 minutes walk from the road and they have cabins you can hire.