We lived in Manistee for 35 years until going full-time. We go back every summer to spend time with mother in law (101 yrs).
The campground is kinda pricey but about the only game in town with full hookups. Having the amenities of the casino can be nice too. Sites now are at least $30 to $37 for full hookup. Weekends cost more and pull throughs are about $5 more than back in.
Manistee has lots of fishing available and is a cute town.