In reply to Tommy Harris:
The main campsite up by the wood now has showers and toilets (luxury I tell you), and Thomas who runs it also has a guesthouse up the road in Ausserferrera. You'll find a few places to stay in Andeer too but all will be at Swiss prices...
Thomas and his family have looked after the wood and massively aided it's accessibility to visitors, and will give good advice if needed (Bodhi climbing is his usual media name). It's absolutely worth visiting the great guesthouse for a meal or coffee on a rainy day to support this.
Please be aware that as a deep Swiss valley the temperature can really drop at night, even in summer, which may be a concern with young children? It will also be busy, and the bouldering / area has suffered from this in the previous years so please clean your chalk, be respectful of the wood and local residents.
Feel free to message me any questions.