The weather says 32 and frost Sunday and Monday nights. We have a deck full of summer flowers. We are not here during the week, so my plan. Drape a 2 Mil clear plastic from the deck railing to a table. This will create a space 8' x 6' and 4' high. It can be open or closed on the sides? The deck is 8' off the ground. Put all the plants under it for 5 days. What do you Gardner's think, will this be enough to protect the plants?