By the sound of it th area you are planning to plant has a good amount of cover and browse in it. Maybe it might be better to keep it the way it is and find another spot for your food plot. ( I am just guessing though) As some words of encouragment... sometimes it seems like it is going to be a lot harder to clear than it really is. A lot can be said for a "weed eater" and a chain saw!

You can use fertalizer to encourage your oaks but I am not sure what number... I supose there are better folks to answer that question. However, at least you have some oaks.. that's a step in the right direction. If there are many competing trees or damaged trees around that compete for nutrients you may want to "harvest" some of them. Oaks produce a lot of food so you really want to keep them healthy and around. When fertalizing be sure to fertalize around the "drip line"

As far as fruit trees are concerned. I am pretty sure apple trees are rather tolorant of a myriad of soils. You can keep the deer away from them by using chicken wire or any other type of fencing to make a type of boundry til the are more mature. I would also try to take a look for some wild trees and trim any space around them for 20 or more yards on each side. There are things called apple sticks or something like that which you can use to fertalize apple trees too.

Good luck with whatever you do. It's really fun to do habitat improvements especailly when you get to watch a food plot or tree grow. It's a very gratifying experience, I only wish I had more time and land to do it. TGK