I’m in your zone and elevation. There are protected and unprotected figs in our neighborhood (most are HC or similar). A lot of the unprotected and untended freeze off at ground level and grow 20-30 stems up to 12 feet tall before winter comes. Most have no figs. I know of one winter protected HC bearing a lot of figs. In the winter, it is surrounded by a wire cylinder filled with leaves but it is sheltered by the wind. I think pruning to 3-5 stems or lessis essential for in ground production here. My inground VdB was pruned to the Japanese stepover style with 5 branches extending horizontally at ground level or slightly below (in trenches) this year. It is still in full leaf today, but has had no figs the last 2 years. It is protected by leaves in the winter. My potted and shuffled VdB is still in full leaf and ripening the last of its figs. I think we hit a low of 12° F last winter for several days. Your choice of winter protection (esp. Dec-Feb) will be the key to your success inground.