I am profoundly confused by one post folk who are still leaking or do not care enough about others to post the cure.
I think your post in #2 nailed it. If I believe everything the fly by poster said in first email, this is what I conclude.
#1. There was NO Coolant leak. Two Repair Garages confirmed as they did a pressure test on the system
#2 . It was confirmed that it was not a serpentine belt issue, nor need to tightened the clamps.
Therefore what did the OP see or think was the leak? The OP did NOT say when or what days the leaks were seen, but given the OP posted to the thread on 4/6, then I assume it must have been some time in May when the leaks were 1st seen and OP starting garage hopping looking for the Coolant leak as the OP may have requested versus taking to the show and asking what is this leak?
Anyway this time of the year is still pretty cool in Billings, so I did a little research, a few days in May the temps got into the 80s (as high as 8

so the AC usage may have been required, but prolly not something that is used a lot in Billings, Montana. OP may have seen the condensate and got worried.
OP figured it and did not bother to come pack to tell us what happened. Oh well, this leak is water off the Duck's back now.