I'm planning an orchard up in the woods myself for similar reasons, and will include oaks and apple trees. When picking your fruit trees, consider the rootstock. In my situation, I'm going to go with something large for drought tolerance and good anchorage...basically low maintenance, but do your research on soil type and local disease pressures that may be mitigated through wise choice of rootstocks. In picking your varieties, look for a spread out harvest to provide food through as many months as possible.