Just thought I would mention the Cullowhee Native Plant Conference that is once more scheduled in the (usually) cool mountains of NC. Optional hikes are on Wednesday, July 18, with other sessions continuing through Saturday at noon. I have been for the past six years, and I believe it is worth your time and money if you have a little of both. I also think there is a good conference at Millersburg, PA, but that always conflicts with a family beach trip, so I have not been. Would love to hear from folks who have been to native plants conferences and their comments about the activities/seminars held.
Here is a link that might be useful: http://nativeplants.wcu.edu/