My experience in the foothills of the Colorado Rockies is that you should get better MPG in hills as long as you drive them sanely.
My wife's Clarity is a right side camera that comes on when you use your turn signal. The drivers side mirror has a "joint" where the outermost inch is angled differently to provide blind spot coverage.
2018 Honda Clarity Touring PHEV - Forest Green w/Tan interior (wife's car)
2017 Volt LT - Heather Gray; black bow ties, Charcoal VoltShelf
2012 Cruze ECO MT (hail totaled 5/8/17 103,600 miles @42.5 MPG)
2010 Mit Lancer GT MT (traded for ECO @31K miles)
2002 Pont Montana AWD - title to son at college graduation
1990 Pont Transport (traded for Montana @240K miles)
1986 Fiero GT MT (traded for Transport - needed more seats)
1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)