I don't know exactly how to go about it in your state, but if its anything like mine (VA), there is one big point I would make:
I've seen plenty of sunshine/freedom of information/open government laws that allow the locality to charge for the search and production of records. If you ask for every single time your plate was scanned and recorded, you could be triggering a massively expensive search of records.
I might counsel first finding out more about how the records storage works, across how many agencies, who's got it/who is the custodian of the records sought, etc.
Gather plenty of info.
And, then, if your state allows you in the original records request to put a limiter on what you are willing to pay, don't pass up the chance. For example:
Please estimate in advance the cost of the search and production of the requested records. If the estimated cost exceeds (insert personal willing-to-pay dollar amount here), please suspend the requested search and production, report the estimate to me, and await my express approval before completing the search and production of the requested records.