I love this idea! I'm going to grab some columbine since they were growing all around vallecito when I was in there on Sunday.
Just a quick note though- I booked the amhitheatre and there were a whole lot of rules that the really nice woman at open space wanted to make sure I understoond so we wouldn't get shut down over anything and one of them is no glass including vases. So, if we could use something other than glass it will keep the rangers happy. If you have any questions, or want me to pick something up you can drop me a note at firstname.lastname@example.org