You are better off going to Puerto Rico to try and pull any of this off. For one thing, we've been sending stuff back thru the mail without any issues for years...plants that are bare root as well as in soilless media, cuttings, and seeds.
The following is a list of all agricultural items allowed into the US mainland from PR.
http://www.aphis.usda.gov/travel/content/wp_c_puerto_rico.shtmlThis list specifically says plant cuttings and plants not in soil are allowed. Seeds as well. While we've taken fruit back with us and had no problems at the inspection stations at the airport, none of us have tested bringing seeds, plants, or cuttings back yet thru the airport.
Our concern was whether or not the guys at the airport had the ability to inspect the plants, seeds, and cuttings...or if they would even take the time to do so. They may have told us we need to go elsewhere for inspections...or just give a blanket "no". Also, as many of us have found out the hard way...we sometimes suffer from their ignorance of their own laws so we didn't chance it. We had a couple of contact names with the USDA down there but we never followed up on this since we decided to just mail stuff back instead.
We actually had a few USDA guys at Ian's farm and we were all set to ask them about all this. When we remembered to ask, we discovered that they had had to leave the farm due to one of them getting sick. We lost a great opportunity to discuss all of this in a setting that was perfect for doing so.