Most collector car insurance policies only cover club events, parades, and "limited" pleasure driving. Also, most do not allow you to leave your vehicle unattended.
My opinion is that these insurance polocies are for the garage queen/weekend cruising cars. If you use your car other than this, you may have a problem getting them to pay on a claim in a different situation than above. It would sure suck to have you car stolen from school and get NOTHING.
I have a "normal" insurance policy with a value written into my policy (TX cannot write an "agreed value" polilcy). Sure, I pay $400 more per year than I would with a collector car insurance, but at least I can drive my car.