Thanks, Hetty. I knew you would know the answers to my questions. I guess I leave my leaves on for esthetic purposes, since I also ship bare-root but always with a large wad of moist sphagnum moss around the roots. Also, the feed-back tells me that my buyers like the leaves left on. I never thought about moisture loss, certainly not in short-term shipping time but also in long-term dormancy. Now you have created an idea for an experiment. I am going to de-leaf half of each variety, label the bags of plants I have done so, and see what the difference is in the spring. I had some really large, "fat" plumeria this year, particularly the 'Celadine' and the difference in trunk thickness may be noticeable next spring. As a side-note, the 'Riviera Rainbow' cuttings that I purchased from Mike grew really well and all bloomed this summer. I should have some nice cuttings and then rooted plants for sale in the spring/summer.
Ken