Off topic boating question (sorry so long)

[freddie]

1. Go slow, especially when docking or headed into the ramp. Your only braking ability is going into reverse, and typically going slow eliminates that need.
2. Pay attention to the wind, its going to push you. Side winds especially, and you have to counter-steer based on wind direction.
3. When going slow, remember that when you steer, the boat isn't going to respond immediately. It's going to take a minute to respond and turn, it isn't 100% instant like a car.

In all, go slow. Especially in marinas, just idle in gear to do what you need to do.

As far as the prop goes, learn a path or channel that works, and stick with it. If you or your wife is having issues hitting bottom multiple times, somebody is not paying attention or not learning.