The drawbridges have been partially lifted.
Kerne Bridge (Goodrich) could still be closed, Lower Lydbrook also will be impassable ATM.
Your best bet is M50 / A40 to Monmouth, the Wye Bridge is now open, Staunton, then turn at Upper Lydbrook for Cannop. Or you could turn back toward Gloucester at the end of the M50, turn just after Weston-Under-Penyard for Drybrook, Cinderford junction, towards Coleford, then turn at Upper Lydbrook for Cannop. Not a quick road that though.
Everything bar the trail centre will be very wet. Dowies has had forestry work, I think it is still ongoing, and will be a bog-fest.