Answer: I understand how wrenching and difficult it is to move and leave favorite plants behind, I have left my own gardens and moved away several times. Of the plants you mentioned, the hostas would have the best chance of moving successfully -- especially since you will be digging them in July and summer is the worst time of year to transplant.
Water them well the day before you dig them up, dig them up roots and all, set the roots in a plastic bag so they do not dry out. Do not cover or wrap the foliage and leave the mouth of the bag partly open. Keep the plant shaded and cool, do not leave it in a closed car for example, until you can replant. Replant as soon as you can. Hostas are resiliant and can last quite a while this way as long as they do not dry out at the roots. I hope this helps.
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