Skin care products while traveling; How much is too much?

Dumbing down a skin care routine so it is travel-friendly can be daunting. I used to need suitcases full of bottles and serums. I was tied to a rigorous routine when the sun came up and when the sun went down. My morning concoction of store-bought products came first, and then when evening came, I had a totally different set of bottles to lug out of my packed du...