Timothy Martin:
Just my two cents, but I would not turn off any of the gear during stretches of bad weather--especially in New Mexico. It will often get extremely humid during those periods. I'd leave everything powered up to keep it warm and leave autodew enabled on the Pegasus. Humidity is the enemy of electronics and optics. If your observatory is climate controlled when it's closed, that's would alter my thinking. But mine is not.
Hello Tim,
Please allow me to have a different opinion.
To keep the controller permanently running (and mount) in warm condition is not a good idea. Capacitors and voltage regulators age much faster the warmer it is. Also the semiconductors age much quicker (RAM read/write errors). The risk of a hardware failure is significantly increasing when keeping it permanently on. You should only do that, if you have a spare controller stand-by; especially in remote locations.
I understand you argument with humidity, but in such conditions you should consider running a dehumidifier. Humidity is the enemy - true, but boiling it, is even worse.
I took to notice, your observatory is open during day. This causes many more serious problems: Significant temperature gradients, dust and UV. I know a case, where sunlight shining through a window on a pier during day, caused tracking issues at night due to temperature gradients. But this is another story. I think, under such conditions the way is to try to close the observatory and protect gear from such harsh conditions.
By the way: According to specs, the mound is only allowed to be operated (=switched on) up to 35°C. If hotter, you run it our of specifications. Here the controller with its passive cooling is at its the limit (some safety margin). But running it above 35°C may cause heat death of the box and no warranty. Please see manual version 3.1, page 8:

We had this discussion also in the 10M forum to this topic. Here the link to the forum thread (I think you need to be registered, but should work for the 10M owners here):
https://www.10micron.com/forum/viewtopic.php?f=2&t=1986