There's always one step up from the contractor's bag, a Christmas tree bag. I just got two more for a buck in the after-holiday sales.

They're 72x90"; opened, they've got a 45" diameter, 7.5 feet long. Poke a hole in the closed end to accept a cord, tie the cord between two supports, and you've got a big bag to break the wind and keep off the rain and snow.

No, they're not perfect, not very heavy-duty, but they only weigh about 8 oz, the enclosure bag is 9x12x~1/4", and will sit quietly in the bottom of your bag until you need it.

Sue