I have been getting by with an iPad Air that has cellular and wifi connectivity no matter where i go. I do have an iPhone Pro 11 as well. Basically, I just carry these two devices wherever I go. As both are readily connected, it is very convenient for me.

For my iPad though, I also utilize a VM which I access through the Shells.com app. This allows me to have access to a Linux and Windows machine through my iPad so I have everything all in one.