How big out holes are we talking about? Like the size of a quarter? You are all good.
It's not like indoor. Indoor you have a light leak and it's likely for a large portion of dark. With depp, you are really only cutting out like 2 hours. Then it's night time. You can play it pretty loose and you will be fine.
I have seen people skip blacking out for a night or 2 tons of times.
If you pull tarps by hand, you will have holes in tarps even if it's 8mil scrim.
If you have ever been in an auto depp with breathable blackout curtains, it isn't pitch black. It's like moon light.
All that said, i have never had a seeded depp. I had a hole the size of a basketball in an end wall for a whole run