If I may - Photoshop does it automatically. Assuming you don't shift your point of view, which you wouldn't being on a tripod, it's quite simple. Only problem would come with wind.
Personally, I've done this a couple of times and not blended the exposure, but instead used the brighter exposure to mask in detail in the shadows. Personally, for me almost any tone mapping is "too much," and causes halos and weird bright areas in the sky where it meets the land/foliage.
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