Backup cameras do help a lot. We had a 2012 Sentra (the reason we now have a 2013 instead is a whole different tale) which had one.Ah good tip. Thanks! I'm in the US as well. At this point, I wish when I bought my car back in 2011, they had cars that came with the backup cameras standard as they do now because I'm sure those help a lot when wanting to back in to a parking lot, etc.
The problem with them however is that they tend to see things closer than they appear (like the warning in mirrors). So you think you're parked close in and you get out and find this huge gap between the back of the car and the curb!
I also didn't like to rely on them too much because doing that tends to dull your own eyeball judgement skills. It can lead to overconfidence and then you look like an idiot when you get out of the car and it's cockeyed and not backed all the way in.
Had that happen a few times.