My friend Joey spent some time today pruning some old apple trees, and found this Youtube video series on pruning overgrown standard apple trees. I've been told one should not do major pruning in spring, but rather in late autumn/early winter when the trees go dormant. But you can trim smaller branches at any time.
I did a lot of pruning this past fall at the Brushwood Folklore Center, and hope this will help the wild apple trees to bear more fruit. Plus to pruning: you have plenty of apple wood for burning, and and it smells great in campfires, or imparts a nice fragrance and flavor to your barbecues! Just add apple wood chips or branches to your charcoal fire to flavor your food.