Get Samsung Galaxy Note 3 or 4 instead. It's just a bit smaller than a small 8" tablet but as capable. IMO - Note is an ultimate survival computer, as it also allows you to get rid of a pen/pencil and a paper notebook, its Wacom pen is extremely natural for writing and drawing. Note 5 and 6 are not recommended as they don't have memory expansion slot and removable battery anymore.

For an emergencies I'm keeping a pocket LAN-WiFi router/AP/Dongle, powered from USB port, and capable to connect to a DIY directional antenna, which could be further improved with a parabolic reflector (find a sat dish or rig it from an aluminum foil).