Congrats! It's definitely feeling down to the wire for us May brides! :) (We are May 12th on NCL :D)
We're having like 11-13 people sailing with us (so not oto many) and something like 25 people coming to just the ceremony. For my family, it's a tiny wedding, LOL but it still feels pretty big and there are so many things to figure out!
We ended up hiring a planner to coordinate a welcome dinner (instead of a rehersal dinner; the night before the wedding, inviting everyone - mostly as a chance to spend more time with our non-sailing guests and family) and she's been amazing- found the venue based on a pretty vague description of what we wanted, and is organizing hair/makeup for us before we board, too.
I will say that although I knew going in they weren't super responsive, I've found Royal Ocean Events to be a real pain to communicate with.