You mean, 50 miles?
The only way to survive it is to set Smart Control in Mission Control app -> Let's Ride.
- Distance: set 50 miles
- Elevation: use a site such as ridewithgps.com -> Route Planner. Draw your planned route. The Planner will give you the total elevation gain. Enter the figure in Smart Control
- Set the "battery left at the end of the ride" at 5%
- Set the reaction to climbing at 0 ft.
When you start the ride, keep the phone near the bike (perhaps in your zipped pocket) and let Mission Control "think" for several initial miles of your ride. Initially, the assistance might feel very weak but it will stabilize in time.
The battery of your Vado 3.0 is a little bit small as for a 50-miler if you or your wife do not have strong legs. Mission Control will do whatever possible you complete the ride still on the battery.
P.S. Riding in Smart Control only allows activating Turbo mode for short bursts by pressing "+" on your handlebar remote.
P.S.2. Never pedal downhill. It will save a lot of the battery charge.
P.S.3. If your or your wife's phone battery discharges, you are in a jam. Take battery packs/powerbank with you!