Hey Nichole! CONGRATS to Kaylee!
If I were you, as long as you were all healthy, I would go especially if there are no cases in your schools! Some advice I have seen that makes sense...
put some neosporin in your nostrils before flying, it keeps your nasal passages moist making you less suseptible to germs.
wipe down completely your plane seats, trays, windows and arm rests with Clorox wipes!
DO NOT turn the air on above your seats! Recycled forced air
DO NOT use the bathroom unless ABSOLUTELY necessary!
Keep hand sanitizer ,at least 60% alcohol with you to have the kids use before they eats snacks.
I always do all of these when I fly, call me paranoid but it works for me!!
One of the biggest things at Disney is, if you go to buffets, make sure you clean your hands before you eat (do you know how many people touch those utensils!)

I am ridiculous, I don't even let the kids touch the utensils, Bryan and I do it for them!
I am sure you will be fine, try to relax (hard I know) and have a GREAT time!!
Sorry I rambled!!
