Perfect. Thanks Bobby.
TL;DR - I replaced the rainfly on the CVT Mt. Shasta tent with one that had no Stargazer windows. It is so much better, and now dries (relatively) quickly when it gets wet.
Bobby at CVT @Cascadia Tents was able to get a stargazer-less rain fly to me for the Mt. Shasta tent, and that got installed just during the second Anza-Borrego trip. While it didn't rain in Anza-Borrego at all, we did get one night of rain, and one morning of (light) snow in Utah and the new fly behaved exactly how I hoped it would - as the sun came out, it absorbed the heat and dried off nearly immediately.
In fact, even when it snowed a little bit - this fly didn't get nearly as wet as the previous one.
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