Not a lot of Info regarding the activities in Chester, but here's the Timings info on the official itinerary:

Friday 28 Oct.
8B Chester Eastgate - In - 19:05
8C Chester Eastgate - Out - 19:25
8D Parc Fermé & Technical Zone - In - 19:45
8E Parc Fermé Out - Flexi Service - In - 19:55
8F Flexi Service Out - Parc Fermé - In 20:40
All cars must be returned to Parc Fermé no later than 23:00