Mary, I've booked the Chester Stone Villa Hotel for us for next weekend for the Liverpool/Arsenal match. It comes highly recommended on all the websites and is a few mins walk from Chester city centre. We got a rate of £90/night for a family room for 2 adults/2 kids, which is very good for Chester. I'll let you know when we get back how it was.
The other alternative we looked at was Holiday Inn Ellesmere Port but we wanted something more central to Chester.
We are going on the ferry also so didn't mind having to travel around as we'll have the car. We're staying for 4 nights.