We were in the same boat (pun intended?) earlier this year.
Folks on this board told us to talk up the trip, post photos and soon we'd have a waiting list of people to go with us (albeit people we already know).
A few months ago, we were debating whether to plunk down a deposit on a cat with TMM (Orion). We took the leap with the hope that "build it and they will come". We've got 3 friends now going with us in November. And others asking when we're going next after that.