I do have to say that with the right mindset, going above and beyond your scope will help improve your skills. That being said, you still need the experience to actually operate in such fields.
As a fairly new medic, I was having some trouble intubating. There happened to be an opening in a US&R medic class that my department was giving. I was (and am) in a different section of US&R but was asked to attend to fill the spot. Boy, did I learn a ton about skills and improve my confidence. I didn't miss one tube after that. Ever. We tubed in confined spaces while laying on top of the patient face to face. We tubed while lying on a simulated roof and sticking our heads through a 12"x12" hole to the patient below. You get the point.
Oh, and doing central lines helped my IV skills a ton, too. I'll never do a central line, but it was still great knowledge.
I agree. Thats the point I made early in the thread. Getting the training alone is a good thing. Even if you dont become a TEMS medic for quite some time, the training and "learning" is valuable.
Plus hey, you may get to put rounds down range, which is always a good thing.