Re: pants and not-jeans - I sometimes do take jeans on trips, but if so I wear them when I fly since they're bulky. But I'll throw out a recommendation for these:
https://swrve.us/collections/pants/products/mid-weight-wwr-trousers
I first bought them as "bike pants" and they're great for that - very comfortable on a bike with lots of subtle and thoughtful design features, plus they look like normal pants and fit me well - but I also found that they became my favorite travel pants, especially (in summer) the lightweight versions, which I am alarmed to have just discovered are being discontinued.
In general they look good, fit like normal pants (the knee darts are subtle), have big pockets, dry quickly when they get wet, weigh little and pack up very compactly, and are very comfortable. Also, they're MUSA, I believe. I've got like seven pair in three weights.