Nope, things pretty much went as expected. I have traveled with them before just never both at the same time. The biggest trouble I was having was that after a few hours they relaxed and went back to being themselves. So while at first they would sit on the same perch and not fight, later they got back to fighting over stuff. It was difficult keeping Kili on my shoulder and Truman on hand because Kili would run along my neck to whatever side he was on to hang off by her talons trying to attack him from above. The moment I'd switch Truman to my other hand, Kili would run across my neck again to the other side.
Yes, birds of prey are always a concern when taking parrots outside. I keep an eye out and so do the parrots. I keep them close. This is about the best I can do.
They weren't stressed much. I've taken each of them flying before and on short day trips. This is the first time they camped out overnight but what's the difference when things are dark and they are sleeping anyway? The temperature was pretty cold at night (about 40F) but that didn't seem to bother them too much either. The high altitude when flying just put them to sleep. So I think it was mostly fun and exciting for them and not particularly stressful.