http://www.chasetownfc.co.uk/ suggests the following route.
Take either M1, M5, M42, or M6 toll and follow signs for A5 towards Brownhills, turn towards Chasetown at lights at Newtown Bridge. straight over first island, over toll road bridge and at second island turn left into Highfields Road (B5011), uphill to mini island, then straight on past church and school. Ground on left at end of road.
I'm grateful to the Chasetown fans who have posted to the messageboard suggesting the following rail routes.
If you are travelling by train then head for Litchfield City (services from Birmingham New St) and then get a bus to Chasetown High St.
Fans travelling by car are invited to park at, and enjoy the services of Burntwood Rugby Club. Just a few mins walk to the Chasetown Ground and the designated area for away fans.