3 The year's biggest concert could cause a nightmare wedding for one local couple. They're planning to get married this weekend... in Downtown St. Augustine... just a couple blocks away from where Mumford and Sons is expected to draw thousands. Now this couple has told Channel 4's Scott Johnson that they JUST found out they may not have any parking for their guests. Channel 4's Scott Johnson is live in St.Johns County with the latest.. Scott? 3 Savanna Demott and Brendan Barton rehearsed for their wedding tonight at a venue called the white room in downtown st.augustine... and they knew parking for their 120 or so guests would be tough in the old city... only they didn't know how tough. SAVANNA Demott/BRIDE TO BE 17:07:18 - it's been so frustrating. I started planning my wedding september of 2012, I found out about this concert in feb. as soon as I found out about concert every hotel room was booked within days.the wedding is being held the same weekend as the huge mumford and sons concernt this weekend... the couple has been told police will try and help them with some reserved parking... but they dont' have much hope this will work.BRENDON BARTON/GROOM TO BE 17:06:48 - 'so it's guaranteed you'll have parking?' no, no, nothing's guaranteed.Except that i'm marrying her and that's it. 'and that's what's important?' that's what's important.the city tells me they put out ample warning about the road closures... and anytime there's a downtown event there will unhappy parties ... but they do the best they can to warn everyone.SAVANNA DEMOTT 17:07:37 - parking is horrible already. So now with 30,000 people down here it's going to be even worse. And then we had a designated parking lot and now we were told tonight the street might be closed off. 3 Scott, this couple is local... do they feel their guests may know st. augustine well enough to navigate around this parking issue?