You'll need to look into state laws, which differ.

BUT, typically you must legally insure any car that is registered, even if you're away and can't drive it. So it's probably not legal to cancel and re-buy when you return. Some states allow some version of "non-operation" status, but that typically requires non-operation for a year, not just a few months.

Realistically, there isn't much you can do here. Some insurers give discounts for low average miles driven. Maybe look into that?