Plenty of parking at the station also easily accessible from London an a frequent service.
Meeting just outside by bike racks.
Cyclopark are holding a Family Fun Day on Bank Holiday Monday. The event is Free but you will need to book a ticket to enter the park. Link and details below.
I have factored in a stop of approximately 3 hrs there could also be an option to continue the ride on to Shorne Country Park.
http://www.cyclopark.com/promotions/family-fun-day-monday-30th-may-2016/
Starting at Dartford Railway Station the ride is mainly on shared cycle paths.
Passing Bluewater and using the path that runs along the A2.
We will then return to Dartford Station.
Whilst this ride can be completed on any bike a mountain or hybrid is more suited to the lumpy paths.