Going to DLR for the first time with two little ones. Thinking about lines and strategies, wondering if it's generally acceptable to have one person save places in a long line. So if my husband waits in a line that's say 45 minutes, while the kids and I go get some ice cream and come back and meet him in line when there's only like 10 minutes left - is this typical, or is it annoying, or even disallowed?