Oh yes bring them in . They will freeze solid in PA outside surprised you were able to keep them out so long in the year.

A home depot plastic bin makes a great brumation container or if you want add a pier/haul out area with a spot light and you can keep them up all winter/even kiddie pools work great.

I keep mine outside all yr long (Miami) in pond but with recent night cold spells of 40s I bought them in till night temps average 60s again and day temps high 70s min.

I use kiddie pool inside .