I tend to disagree with the majority of responses. My kids are in full-time day care because we're both working parents, so I strongly advocate everything that having your kids in some kind of structured environment brings.
It doesn't sound like all preschools offer a curriculum. We're fortunate that our day care does. Our son just turned 4, and in conjunction with what we teach at home, we are convinced he'll be reading well before his 5th birthday largely because of the practice at school with letters, phonics, etc.
Even if you focus on teaching things at home (which every parent should be doing anyhow) and socializing through things like dance, I think the most invaluable lesson of preschool/day care is recognizing other authority figures and having to understand how the academic environment is structured (also things like consequences for not listening, misbehaving, etc).
The other thing that she'll benefit from is getting adjusted to the schedule. All of our neighbors who are SAHM said they had a tough transition to kindergarten for their kids who didn't have day care/preschool first (being able to focus longer periods of time, being tired, etc).
The travel component certainly makes it challenging and unique. So, perhaps, I'd wait, but I think I'd want her involved in some way when you are at home (even with more travel upcoming).
Good luck.