The tyres tried, all nominally 47mm 650b
terravail rutland
Possibly the best on the road. Great off road in the dry. Some ability in the wet. But they come up really small. If in could fit the next size up i might have them on all the time
Terrano dry. Good grip in the dry. Better in the slop than you might expect, but obviously not great. Big volume and supportive side walls makes them amazing on rough stuff. They don’t role as well as you might expect
Wtb sondero. Middle of the pack size wise. Pretty good in the wet stuff. Role better than you might expect. Much better value than the Teravail tyres. I think the sealant had to seal the odd bit of side wall but it wasn’t really an issue
So for your use I’d say Sondero. Unless you are happy to comprise on mud then it’s the Terrano dry. The Rutlands are just too small for rocks IMHO