The forest is pretty dry at the moment and mostly drains pretty well even after heavy rain.
The Cannop Valley route is the one posted on a website for a pub / bunkhouse in Parkend I believe? Will be rideable although one part of the route runs through a Nature Reserve where bikes are 'frowned upon' so don't be surprised if some well-meaning local dog-walker tells you to get orf their land. One junction of tracks in the woods can look much like any other junction of tracks in the woods, so have fun 😉
Plenty of other riding too. Get along to the Pedalabikeaway cycle centre at Cannop where you can get maps and advice. The area behind the centre is free to MTBs although there has been a lot of felling in the area this year so some trails are unpasssable at the moment.