I have a 3G/4G modem with unlimited use (from Clear), and no longer consider WiFi availability as an important part of the decision making process of where to work. I'm currently camped in the desert in Southern California, 35 miles from the nearest "big" city (Brawley, which is not very big, but it does have a Walmart). But, I never have been able to work in coffee shops. I can't think long enough with all the distr…
In the past I have lived or died by Starbucks and Caribou - driving around Omaha or some random town in Colorado trying to find public internet access. Now that I have a phone with national internet access, truly mobile internet is going to completely change how I work when I travel. The rest stops with wifi have been fun finds in the past. There's one 50 miles west of Omaha for instance with decent wireless internet…
I've found that rest stops with WiFi are rarely in working condition. I'm not sure why it's so hard for public hotspots to be kept operational, but apparently it is, as I'd say 75% of the ones at unattended locations are simply not working. I've learned to never expect WiFi to work, even if it is advertised on the sign or on the website or whatever. The same is true of campgrounds, 80% of which claim to have WiFi but only about 40% of which actually have usable speed and reliability. I'm tempted, being a nerd, to just go around fixing campground networks, free of charge. But, usually, I just use my 3G/4G modem. I'm getting 500kbps-1Mbps here in the desert, which is completely usable.