Thank you for all the great info, everybody.
I do have the skills and energy to tackle a project like this, but just not the time right now. I know it's not worth all that much, so I don't want to sink a bunch of money into it. If I could get the materials for $500, like hilandfrog, it would definitely be worth doing for me.
It would have to wait until summertime, which is why I'm really trying to come up with a temporary fix to get through the winter. I know I can focus more on a permanent repair during the summer, or pick up a different trailer with the help of tax return money in the spring.
After searching the web a bit, I've found a 10' x 27' canopy for under $200, which I think would fit the bill for now. It'll keep the snow off the roof, so in the event of a heavy wet snow, I should have nothing to worry about anymore.
I'm going to climb up on the roof again this weekend and do a further assessment of the damage to help decide what to do after I get through the winter.
