I understand he and Karen have a young son as per his videos but I don't know much about their personal side.

I do know that he was very knowledgeable and studied survival techniques thoroughly in the classroom and most importantly in the field. For example - he debunked the practicality of using a still (pit dug in the ground and clear sheet with a stone set in the middle) to gather water. The energy and water expired required to build one far outweighed the amount of water gathered from such a devise so he didn't recommend it in a survival situation. I have most of his videos -- his techniques are suited to many different environments but are most suited to his native Idaho. For northern boreal forests, I defer to Mors Korchanski.