We have successfully moved several fruit trees. We've just dug as big a root ball out as we can handle and cut the roots back so there are no torn ends and moved it immediately to the new hole. The important thing is to keep the water up to it (for the next year) and if it is warm shade it from the sun. If it is a large tree you may need a bobcat or similay to dig it up as you need as much of the roots as possible. On hot days for the first few months leave water constantly drippin onto it (we use large plastic bottles - as large as you can get - I use the ones cat litter comes in! - with a dripper put into the bottom).