I've been wondering about this too -- we were at WDW at Christmas last year, and on Christmas Day, we were afraid to leave the park (to go elsewhere for dining, or back to our resort for a break) for fear of it closing and not being able to get back in. After our trip was over, I found out there were different levels of closure, and because we met all the requirements (had already been in the park that day, staying on site, multi-day package, etc.) we would have been fine with all but the very last/top-most closure and would have been fine to leave in all but the most dire case. Oh well!
We are going to DLR for Christmas this year (the week of)

So my question is, does DLR have "levels" of closure as well?

Or is it an all or nothing kind of thing (it either is or isn't closed due to capacity)? We are pretty much rope drop to park closing kind of people (yep! crazy!

) but just wondering in case we wanted to leave and come back for some reason.