Plum Trees - Mirabelle

Hello folks, today on my allotment a fellow grower asked me if I want some plum tree saplings and if so would I remove them today or they would go either on a fire or to some other plot holder with an interest. I jumped at the chance and said very definitely,yes!! However, when I got to her plot the trees were a little bit more than saplings,I'm sure they are at least three years old and in good nick. I managed to dig up three of these trees,but the ground was so poor and dry it fell off the roots leaving me with a bare rooted trio of plum trees. They are called 'Mirabelle',but my worry is will they handle me moving them? I put them in a vat of water for a good hour then planted them and watered each of them again with two gallons of water each. The main problem is that the leaf buds have already started to open and I wonder if this is going to put the trees under a lot of stress. Any thoughts please? Thanks for you time 

cheers yorkie,at least it sounds as though its not a lost cause

Prune in June to avoid silverleaf.

http://www.gardenaction.co.uk/fruit_veg_diary/fruit_veg_mini_project_march_2d_plum.asp

Thanks for that,Ice....PS; Marge Simpson ROCKS!!!!

Thank you.