Thus, the marriage is completely valid. Here are the resources you asked for. Camp Swig, Highway 9, Saratoga, California. There may be camps closer to you, but I don't know your area. Try the Federation in cities like Seattle and Vancouver.
Nobody knows for sure, though many claim to sell the answer.
For my two cents, the answers are Jewish commitment and early success. But generally, children learn Jewish commitment at home, as modeled by parents and siblings. Just keeping the community going demonstrates a high level of commitment, and children become aware of this by watching their parents. In larger cities, Jews can remain marginal without immediate ill effects, though it shows up in subsequent generations. Children sense parental ambivalence and the unimportance of Judaism in life as the family really lives it.