The HP Stream 7" tablet provides a good choice for digital field operations. The Stream 7 has a SINGLE micro-USB connection that must be used for both data I/O and charging. The good news is there is a dongle by Dell that does both simultaneously. Many thanks to K10Q and KB6BT for finding and testing the Dell dongle.
In the last few days, my gateway is having problems. Sometimes it works fine; other times not. I'll leave the gateway up because it can be used, but it's not 100%. And I'll keep trying to find the source of the problem.