Ahh now I get you.
I would ride straight to the Qs on country roads, camp somewhere and go riding for 2 days, then packup and ride back. See if you can’t get the Qs mob to guide you – they’re paid in cake.[dibbs, knottie8, sharki, et al]. If you get the OS map, you’ll quickly work out that all the combes at the north-west end have ace descents – many with variants. The great wood is more tricky and local knowledge is needed to find the choice stuff. The Qs are 100% weatherproof too.
If you’re doing the Mendip (my patch), roughly follow the West Mendip Way eastward until you get to Black Down/Rowberrow. Camp, mess about on the trails, ride back next day. Not so weather proof.