I also second the in reach mini 2. Worked well on my 4 day trip in NH this year. I was able to pretty reliably send updates to my family although I wouldn't use it if you wanted to use the automatic tracking intervals because I don't think it has the battery for that on longer trips. I would just send updates when taking a break or if I were to need to change my route I set up a way to let them know and could send more frequent updates.