I had no idea you can reschedule your DC day due to expected weather issues! We are going back the first week of June and that is something that has always worried me because waves of bad weather can pop up just a couple days out and potentially significantly affect your time at DC. I know that afternoon showers and thunderstorms are routine in Orlando in the summer and there isn't anything you can do about that.
Yes and they have always been very accommodating, hassle free every time I needed to make a change. I also go around xmas time which is a very busy time of year and still have had no issues changing my DC dates. I cant speak first hand for the additional charge if u needed to reschedule more than once but I've called and changed my date the day before and there were no fees at all, really fast, easy and hassle free and even though it was the day before, it was still only about a 18hr notice. Now, I dont know this for sure but I'd bet as long as u had a legit reason for needing to reschedule more than once, u could probably get any additional fee waved. I've been to DC several times and I've rescheduled my dates on few different trips and from what I gather, that fee is there to prevent people from just rescheduling over and over again just to get the hottest and sunnier day, so if u actually have a legit reason outside of weather, call and ask to speak with a customer service manager and i bet they wave the fee. But hey, most of time u dont need to change more than once and u can do that for free for any reason whatsoever. Also, keep in mind that DC only books a limited amount of guests per day and there is a risk of NO Availability on the new date u wanted and therefore u either keep ur original date or choose another date that's available, I've always called the day before and have never encountered this issue but just know it's there and possible. One last suggestion I always tell people, if ur going to do both DC and WDW on the same trip, try to book DC back to back with an off(rest) day so if the weather does turn bad, u at least have the next day open to reschedule. Example...book Monday DC, Tuesday off day nothing planned, Wednesday WDW and so on. This way u have the option to keep or change ur DC date but if u book say, Monday DC, Tuesday WDW, Wednesday WDW, Thursday WDW, if weather is bad Monday, u cant just call and reschedule all ur WDW plans, u already have all ur FP setup, dining setup and everything planned out for WDW and u cant make changes to that, so try and give ur self a 2 day floating window when planning out ur trip. Good luck and great weather, we love DC, especially the all u can drink all day, I highly recommend the drink upgrade package, well worth it.