Not sure where you live, but here's something that I thought you might find interesting, even if it's just for the "what-it's-worth-department." Check this out:
Even though the picture is small, try to take a close look at that truck. I've seen it up close, and it is imacculate! They can tranport two PICU or NICU patients in there at once along with a full care team. They even have DVD players for the kids to watch on long transports! :-) I guess that doesn't answer your question though, but it sounds like something that would be right along your line of interests.
I know you don't really want to do a whole lot of adult EMS, but unfortunately it's all part of the deal. Unless you can find a specialty unit like the one I showed you here, you are likely to transport just about any kind of patient in EMS, including those old guys having MI's. But even they do some adult transports too. It's not so bad though. EMS in general really is quite enjoyable. Given your interests though, I would look for a specialty unit like this one, where they don't run emergency calls in the community, but rather they do specialized scheduled transports, or maybe find a team in a local hospital that accompanies ambulance crews on specialty transports like that. I know those units are sometimes hard to find depending on where you live. I know you said your hospital doesn't have a specialty PIC/NIC transport team of their own, but possibly one of the other hosptials in your area does? There are some agencies who do just that; they staff special prepared ICU RN's to accompany flight teams and ground crews on transports like that. I know of a hospital in my state who has sent their flight team to other hospitals in my area to pick up patients, and they sent along another nurse who does only that - he accompanies flight teams on both helicopter and airplane to transport very critical patients.
Anyway, just some ideas.... If all else fails, move to Hershey, PA, and fly with LifeLion. :-)