Talking to my doctor tomorrow. I ran a 20 miler Christmas eve and I could breath but I had constant drainage. I can breath now but I am taking mucinex D which I don't want to be on during the race. I hope to just be on an antibiotic.
I am in the same boat as you and wear my headphones but I am not ditching them. I will just pause my music when I need to.
I run with both headphones and without. Personally, I prefer without, but there are portions of the Disney courses where there are gaps in the entertainment - not as much on the half. Even when running with my music, I just pulled out my ear buds when I got to a part of the course where there was some action. You can expect music and/or characters at least every mile until you reach MK. There are usually 3-4 high school bands and cheerleaders in between. You probably want your music when you exit MK until about mile 10, even though there are spectator areas at the resorts and some character spots.
I've used my headphones on every runDisney (and otherwise) race. Nobody has ever said anything to me about them. I usually listen to podcasts or audiobooks, so it's just another voice in my head--I can still hear all course announcements, cheering, etc. In fact, the random DJ's they set up are kind of annoying to me because they are so loud. I've often turned off whatever I'm listening to while inside the parks themselves, but the stretches on the roads are too boring for me. I need to keep my mind off of what I'm doing.
Oh yes, Wine and Dine 2015. They had everyone leave the starting corrals and take shelter in the sports complexes. After a delayed start they cut the course short resulting in a 7 mile (approximately) race.
