Two great updates...
One: I can't believe I didn't mention this before, but... Patrick got his orders changed (thank you Lejeune!) and does not have to report until about 10 days after the wedding (which even gives us time for a honeymoon!)
Two: Thanks to Danielle over at www.districtweddings.com, I may have found that loophole I've been searching for in regards to an officiant! Check out her website for awesome info on different DC venues!