Have you considered calling local SSDI attorneys who have some experience in both fields (SSDI and workers comp) for a free consultation? that's what I did in California when I had some SSDI/workers comp crossover questions. ( I had asked my worker's comp attorney first, but he'd said it was out of his field of expertise.)

Most people didn't want to talk to me once they found out I was represented, but some did. I was able to ask a few questions first, and got some very helpful information that way.

(For what it's worth, my WC attorney advised me to apply for SSDI benefits as soon as possible, but I'm guessing that's something that varies tremendously from state to state, and case to case...)

Best of luck.