I am having pretty good success growing figs here in CO. They grow great, ripening fruit has been the challenge so far. I haven't had any trouble with the sun on mature trees. I know another forum member in CO Springs (much closer to your altitude) and he hasn't had any issues either as far as I know.
I have seen leaves get a little droopy in the mid day sun if the tree was over fertilized and grew too quickly, but not dried out. The only time I have had leaves on mature trees dry out is in the late fall when I am withholding water to encourage dormancy, and only then long after they drooped and showed other signs of water stress. Reading your first post, too little water could have been part of the issue.
With small/new trees, it has been a challenge at times to wean them off of humidity. If you go too fast or too soon the leaves will dry out then, but the tree will usually put out more and do just fine in a week or two.
Are you moving the trees in and out of the greenhouse? That might cause some scorching with the increased light intensity and lower humidity. If that is the case, maybe moving outside to shade first, then then slowly into the sun would help.
I am growing my large trees in ~25 gallon pots and they do get pretty dry between waterings during the summer. The potting mix is light and quick to drain, so they do not stay soaking wet after a watering for long.
I would expect you should be able to grow figs where you are without too much hassle, but don't have experience in your exact climate (though pretty close). I wouldn't give up yet.
As for gophers, I don't get the pleasure of dealing with them here, just tree rats.