Staying in touch while RVing is a challenge we all face. And a key tool many of us end up acquiring is a data card that lets us set up our own Wi-Fi networks to connect our various tablets and computers to the Internet. True, many of today’s tablets and smartphones have a feature that will let you do that without the need for special card. But a special data card adds, in my view, more convenience. It can be plugged in and kept somewhere in the RV and be always charged, always ready and not pull down the battery on the other devices. All of the various wireless providers…