Trying to roof in the rain: late August

I found a great video tutorial on replacing a travel trailer roof here. What an incredible help. Day 1 went swell, getting the awning off, unscrewing the termination bars that hold the old roof on, and removing the vents and A/C from the roof and getting the old roof peeled (eh, flaked) off. Day 2 is another story: stalled by a rotten patch of wood, come and go rain clouds, wrestling with a monstrous tarp once, twice, three times. I was soaked through and through on the outside, and admittedly my spirit was pretty waterlogged too.