@Linkat,
I'd get them. I only wear glasses for driving and it makes a huge difference, not only for night driving but when the weather's crummy. I don't have to use them for day driving unless I am in an unfamiliar place...
If you don't wear them all the time you won't be dependent on them. And they really help.
Aging be damned! Be safe about it, especially cause you've got the little ones to think about...