Unfrozen Caveman Planner
Pretty much the same in my state.The way they structure it here is they have a handful of 'early voting sites' spread throughout the County (County runs the elections here) and if you live in that county, you can show up at any of them to vote. They check you off on a paper and a computer form to indicate that you have voted, and they hand you the proper ballot. It works out great for me because it allows me not only time, but location flexibility and the computer check in synchronized with the other polling places to prevent me from going to multiple locations and voting more than once.
If you vote on election day, you have to go to your assigned polling place.
But for early in-person voting, we only have the option of the Board of Elections office, which is located in southern part the township just north of the county seat. Good thing I live and work in the county seat, so the Board office is a 5 min drive from either my house or office.
But we are a much lower population county than yours, so having multiple physical locations is a good idea for you.