It didn't really take up much space for the fruit trees. For the nut trees, I used them along the perimeter--sort of as a transition between the woods and the yard.
The nursery where I bought the trees (bare root, by the way) gave me a lot of help in terms of spacing. Since most of the trees are semi-dwarf, I used a 15' x 18' matrix. I used 8' x 8' spacing for the blueberries. For the nut trees, I used 35'. Again, the nut trees were planted all around the perimeter, so I didn't have to utilize a grid. Although I didn't have to, the way I laid it out was by rows: I'd have a row of 6 peach trees and I'd alternate the variety like: variety 1, variety 2, variety 1...you get the drift. On row 2 of peaches, I started with variety 2, then variety 1, etc. I probably over-thunk it there
Basically a landscaper friend of mine (and one of his workers) used his skidsteer with the auger attachment. He wallowed the auger as he dug the hole so that it was about 15-18 inches in diameter and 2 feet (or so) deep. We first laid out the grid with string and then sprayed orange marking paint to "mark the spot." Then my friend dug the holes and me and the other guy planted them. The nursery recommend light fertilization with a low-nitrogen fertilizer so that is what we did. Beyond that, we added nothing else. The soil is pretty good here.
We are going to plant raspberries and blueberries, but our nursery recommended waiting another few weeks. It may have to wait until even later than that--I'm worn out!!
Jim