Lens selection for upcoming trip

[Mark L]

So in order to spend more time with the family, forget the 70-200mm. May help you not have more photographic possibilities entering your head.
Take the TC, doesn't take up much space.
Now the choice between the other two lenses?

This is gonna really do my head in.

Toss a coin.
Heads, the 24-70mm, tails, the 24-120mm. Simple really. Go on, do it, and then you can get onto thinking about other things.