Yesterday, Spencer and I got the roll-up door pipe replaced using the larger diameter pipe and new fabric clips.  It feels like a stronger assembly and, although I'm not looking forward to another big wind, it seems like it should be able to withstand stronger gusts.

I am still looking for a cheap but solid walk-through door to install on the South end, so we don't have to roll a big door up every time we want to get access to the inside of the high tunnel.