Question: Tips & Tricks for Patching Canvas Tents at the Seams

Hi! I'm pretty new to the whole canvas tent thing. Last Pennsic, I did a rough patch job on a seam that had a very noticeable hole at the seam where one of the wall posts sits around. Not at the eye, but very close. I ended up taking two repair canvas patches and sewing them around the seam. It's a rough job, but that worked at least.

We found that we still had more leaks around other post points. There's seams close to the other eyes around the top, causing water to seep in and run down the posts that were affected. Any tips on how we can better patch these tears?