Tell the insurance company EVERYTHING!!!!
If they find out after the fact, they can deny the claim, and if you hit someone else, you will be stuck with the bills.....this is not the time to be vague.
When I got my insurance ($20k agreed value coverage), I emailed the insurance agent a link to my website. That way there is no confusion....they have been notified....
Also, keep in mind that if your vehicle is not legal (ie does not have correct equipment re: State and Federal vehicle code), you could also be denied the claim. Be specific....