Honestly, I'm almost getting a Pteranodon Flyers vibe from Yoshi... Capacity-wise, not ride system style.
Of course, not nearly as bad as that example, but probably a ride that is more popular than it can handle, so will garner long lines.
And it looks like one adult and one kid per RV to me... So if no kids in your party, just one adult will be riding by themselves much of the time on this ride.