I typically send all three. I send the link for the driving directions, I send my own summary which makes sense to local people, and a screenshot of a map, with my scribbles on there. "There's this landmark, here's where you turn, this is Xyz Lane which you'll see on your left just before the street you turn into, so be ready when you see it, here's our house on the left. If you're coming from the south instead of west, this is where you'll be coming from." As far as I know, no one's ever gotten lost this way.
I can't speak for the others, but I have lots of friends who have phones with no data plans (probably 90% of my friends, in fact). I can't send links to their phones, but I can send them screenshots via MMS. It's come in handy on many occasions.
Unless you want to be a doormat like that guy in the commercials whose friends call him to ask him for driving directions and movie show times because your phone lets you browse the web while you're in a call at the same time. Let your friends look up their own directions.