Stoneking Rally.
Just back from doing a club week – however it would be pretty easy to book your own Coolbus or 3sixty Transfers van/driver (worth it as they know the route very well and some of the uplifts are, ahem, “challenging”), then follow the trails on Komoot (which is all we did on club week – there’s just more people and a bit more of the logistics done for you). The hotels/overnight locations are pretty obvious, and we ate some great food en-route.
Riding wise, its one of the best things I’ve done on a bike – radically rewrote my “top 10 best trails ever” list.
Not cheap, but I’d do it again in a heartbeat.