I dont know how far you consider "too far" to be, but when I had my hit & run tangle with a Ford Explorer back in 2001 the folks over at St Anthony Central in Denver did a first rate job saving my legs. They are a full blown Tier 1 trauma unit there, so they can take the worst of the worst. It's only about an hours drive (roughly) from the proposed site of HPR, and a Helicopter for the really bad cases can touch down about 10-15 minutes after the call comes in, if that long.

I had a really cute flight nurse too, Karen, long red hair *smiles* very pretty lady, almost worth the crash just for her