CBabs -
You are quite welcome.

Normally our winters are around the low 20s. We've been hit these past two years with the polar vortex, so who knows if this is the new normal. One thing that has been consistent is rain, rain and more rain. We go through rain for days at a time all seasons. When I started out, I kept getting the sand is "super star" response as well. For some, I say it will work wonders. You may even have success with it. My main problem is our city's sewers can't keep up with drainage and with the rains, our yard will sometimes get soggy. Even with a roof, rain gets in. Because of the clay soil and no where for it to drain to, the sand just didn't work. The sides would get wet and would start to reek for days. Because it wouldn't stop raining, it got so bad that I started hauling out wet nasty sand during a downpour. Not fun at all. Now I have a bunch of sand that won't decompose in the compost and I am hoping that by spreading it around, it will eventually go away...
However, on the dry days, sand was great for me in ease of cleaning. But it was dusty and the birds didn't seem to like it very well. They refused to eat sand covered food, and another bird wouldn't stop eating sand to the point she got sick. I found out later it was indeed sand as it came out in large quantities through digestion and as soon as I removed the sand, I saw almost immediate improvement. I honestly thought I was going to lose her.
But do keep in mind, these are only my experiences. Sand could be your best friend. I do know that once I started asking around, others in my area reported the same issues with sand. Smelly, impossible to dry out and rock hard in cold months were the consensus.
I'll be sure to update as we are entering into the rainy spring and I'm curious on how it will work in the summer and with flies. Flies were horrible last year even with sand.