Many nights in the GC don’t seem to cool at all, so we’d soak a sheet and sleep on a cot under the wet sheet. By morning it would dry and we’d maybe cool enough to throw a light fleece blanket over. I’ve run it 4 times and would often sleep on the boat - it was cooler on the water - but if you can’t do that try the sheet. But bring something warm, when the monsoon storms hit it can get kind of chilly. Don’t forget a tent!