My old Garmin 800 can do most of what you're asking for, except the 12 hour battery life is right on the edge. One of the external batteries that are nearly ubiquitous can boost the battery when it starts to run low. The 820/1000/1030 are going to be pretty similar. Don't want power or heart rate? Don't hook up a power or HR sending unit!


Just to be sure, you do understand the follow a route with turn by turn navigation, and the ability to reroute, are antithetical? You'll likely want to start with re-routing turned off, to make sure you stay on route, and it'd be a good idea to jot down on a 3x5" card how to turn auto-routing back on and carry the card with you. Yeah, old school, but dang, it works.