If they are 10 years old a 5 gal bucket doesn't seem big enough. Ideally dig them loose, wrap in burlap or anything else to hold the rootball together and then get them out of the hole. Around here they are shallow rooted, similar an azalea and move easily. Guessing the size of the plants I'd go for a 2 or 3 foot diameter rootball. Water well in new location, they should do fine.
With the digging I'd cut the rootball to size w/o lifting then go about 10 inches further out and start removing soil all around the plant. Should allow rootball extraction w/o breaking it up.