It will be busy, but there's really not a time DL isn't busy anymore. I've, honestly, gone at that time for the last several years and find it nice because I hit the parks early and back to the room by lunch (little ones take a nap, then pool for the rest of the day). Because everyone is staying at the parks until midnight - 1 AM, a 7 AM MM is practically dead. We hardly ever go into the park at night (occasionally for a night show), so we're all rested and ready to go that early. I've walked into the park with no wait on some mornings during summer.