RE: high fence question ?
Two years ago I would have said, "No way!", but I have been hunting exotics behind high fence the last few years, and have changed my views on high fence hunting. I think it would be a good safe place for a child to be introduced to hunting, and, in a large enclosure it is definately a challenging hunt. I have not hunted whitetail behind a high fence, and do not plan to do so. If I kill something large enough to make the book, I want it to be eligible for entry.
If they have exotics in your area, you might look into taking your child on an exotic hunt. Here in Texas they are more affordable than a whitetail hunt, and it would be good experience.