I'm thinking about a trip out to DLR on March 1 to 5 (2 -4 in parks). Are there any concerns about these dates? It gives us a Saturday through Monday, and I worry about the crowds. This just kind of works out best for us right now though, but we could consider shifting. Also, looking at the "Promo" tickets that are still around. They are a good deal. Any issues with them (they have some blackout dates in April and must be used by May 28). They seem normal but maybe too good to be true? Any advice is appreciated. Thanks!