Agree with the problem of moisture loss through the foliage...
Rather than soaking the roots... I'd heel the trees in a large container of soil for the ride... and I'd keep the container in the shade till the weather cooled off... planting them out with the autumn rains...
hopefully the trees will survive the experience...
Would help a lot if you'd told us where you were... "adjoining state" doesn't help much.
Up north... or in a rain forest, you can get away with a lot more than down here where I am...
at my house... even when I do everything right... it's still a hit or miss proposition.
