I like the idea of hanging the bridal party bouquets over the head table. Side note if head table was round under tent, I would have table centered in the venue with guest tables around it, with flowers above.
En masse, carnations look so pretty and provide a pop of unexpected color to your wedding decor. String them outside from a tree branch, as shown, or use as a backdrop for a photo booth or cake table. also, carnations are very inexpensive.