Found an abandoned road to test the lockers, it wasn't too difficult, but being alone and not knowing what's in front sure got the adrenaline pumping. Knowing it's not a good idea to wheel alone, I walked every difficult section and was set on returning if anything seemed to difficult.
First attempt, no locker, then front locker on (and it slid down), then rear locker on too. It was ridiculously easy
I stopped because my wife said I was hitting something, otherwise it would've been easy to climb on that ledge.