I would say the first thing would be to find a location for the event. We are a retail florist that would be happy to help you with your flowers. We are located in Littlestown, not far from Gettysburg and do weddings there quite often. We could certainly recommend other vendors as well.
I am the Wedding & Social Sales Professional at The Gettysburg Hotel, Est. 1797 and would Love to talk to you about your wedding plans. I not only have a venue but a plethora of Wedding vendors that I work with on a regular basis. Give me a call at 717-338-5407 or send me an email at firstname.lastname@example.org. I look forward to hearing from you.