Keep in mind that 6-12 weeks is a long time to be stayin in the Valley.
Speaking strictly in terms of learning OffWidth, we may have to drag
you to some mellow short instructional cracks a bit further north--
a short field trip before you start ravaging the Wide in the Valley.
Plenty of time for psyching up before your stay.
this is the kind of reply i was hoping [fishing] for, and i think you'll laugh at what i consider short coming from the uk (think 10m or shorter routes as a regular occurrence and you'll begin to get the idea).
of course if you can recommend/offer a place to stay that'll no doubt sway my plans! but i do have to say, this is a trip about cracks and not about the valley, big walling would be awesome and the icing on the cake but its not a must.