I recently spent several days in Fort Wayne, and can totally understand your wife’s desire to go somewhere else. (kidding, just kidding!) Take her to DeBrand’s, buy her some raspberry truffles, and have a heart to heart. Each of you should write out a list of pros and cons of the trip, a plan for what would happen if she went into labor, and how she would feel to be far from home and far from you if that were to happen.
She should absolutely discuss it with her doctor and follow his or her suggestions. Even if the doctor says it’s OK, talk to your wife about it some more. She may be thinking that you’d have enough time to get to the hospital if she goes into labor while on the trip, but not every woman is in labor for 12 hours. My first baby was born after only a few hours of labor, and only two of those hours were at the hospital.
Personally, I wouldn’t take a risk like that unless the reason for the trip was something extremely important to me. Like, a close family member about to die. That’s the only reason I can think of. You could even make a “deal” with your wife that if she postpones the trip until the baby is a few months old, you’ll care for the baby while she goes on the trip.
Edited to say: If your wife were to go into early labor while on the trip, she’d give birth in a strange hospital with a strange doctor who is unfamiliar with her history and her birth plan. Is she OK with that possibility?