Hi Kate,

I did install a Shademaker Awning on my very first 81 Scamp 13 a long time and many trailers ago. It is still on the road and used quite a bit by the new owner.

We don't get much rain here in AZ so not sure that I ever noticed this to be an issue.

A couple of things I'd try that could resolve this:

1. At the top of the bag where it runs into the awning channel is stitched. Most likely the leak point where water is entering. Remove the bag awning from the track and liberally coat the stitched seams, like is done on a new tent with Seam Sealer.
2. At the low point of the under side of the bag if water persists after seam treatment, I'd install some grommets across the bottom low point to allow the water to weep out and not collect.

I think that one or both of these steps might resolve it.

Of course, there is another solution. You can move to Arizona.