In my greater friend-group, we call them "shamans", and rotate responsibilities when people go on trips. Like a designated driver or lifeguard, it's a position of elevated and celebrated importance, even though the traveler may not ever leave their couch.

and most importantly be human

Now that I think about it, it's key to be the most human possible. People do irritating and annoying stuff when they toss sobriety out the window, and sometimes it takes a lot of compassion and empathy to manage.