Its not a small site any more, but the facilities are excellent, and just outside Innsbruck its handy for almost anywhere.
The site is called Natterer See, it has a swimming lake and a restaurant, and fantastic tent pitches. We have used this site on a number of visits and would definately re-visit.
A smaller site near the village of Fugen in the Zillertall valley looks nice, good location, but have never camped there we stay in a hotel in the village.
Only dead fish go with the flow