We are in the same boat, and I started to put my posts in today.
My rows are 14' apart, if that helps. Waiting so long to trellis has been an absolute nightmare, and weed/insect management have been a nightmare with bines growing eight feet into the middle of the rows and around 30 different nightshade weeds. I would only wish this much hand weeding on my worst enemy. I firkin hate nightshade.