I raced the Cat 5 at the littleton twilight last weekend for what its worth I decided to try crits this year from Tri the last 5 I have a similar FTP as you and thought it would make it pretty easy. However, the amount of tactics and strategy involved can quickly make your power not mean shit haha

I have all the same concerns as you with injury and its what stopped me from trying crits earlier. I have had some good fun doing the practice crits at CSP Wednesday nights, even though they have had some crashes as well. Honestly it just does not give me the same feeling as tri and i am still worried about crashing. The cost of gear and injury would really piss me off.

Also keep in mind that race last weekend is one of the bigger ones in Colorado so the Energy and crowds are much much different at that one then most other normal ones.