We went with two way texts instead of a satphone: the Garmin/Inreach Explorer. Very happy with it. Full unlimited waypoints and text messages, spot weather reports, trip tracking, facebook status reports, and emergency
alert capability for $75/mo. Limit the waypoints, text messages, and weather reports and you can do $20/mo plus a per text fee over 10 messages. When landbased, the service
can be deactivated (month minimum).