We both have iPhones...before that, droids....we've gotten new phones every two years for the last 14 years. This year is the only time we are not anxious to get rid of our iPhone 4S's. We love them. The 5 or 5S just doesn't offer enough for us to do another contract. We currently have AT&T. Before this was Verizon for years. Staying with a company is not necessarily beneficial. The only thing we miss is they unlimited data we had with Verizon. But you get better incentives often with switching to a different company every once in a while.
We both have iPads. I won mine on Facebook from a KOA a couple years ago. We are both sitting here now on them. I have nice desktop in my bonus room with a 24" monitor. But it's so much easier and convenient to use the iPad.
If you will be traveling, then I believe a smartphone is indispensable. There are many apps that you can use at the fly. Gas buddy. Woodall's. KOA. MobileRVing. Flyingj. Next exit. And many more.
