How about the Friday before Memorial Day? Would that be a really busy day? TIA!
It will be really busy, but they won't necessarily shut the gates. Like others have mentioned, it's pretty rare. The last time that I know of that they reached capacity was on January 2nd.
Usually when DL reaches capacity, you can still get in over at DCA. Though once DL closes it's gates, I imagine that DCA fills up quickly. But it would take *a lot* of people to fill both parks to capacity.
Guests of the DLR hotels will always be allowed in....right?