It won't necessarily be easier because they are a family because they probably won't recognise they are a family.
I have a trio that works excellently (one rabbit is a bit of a loner by nature, one is a bit of a whirlwind and one like to play with the whirlwind but also retire with the loner bun. They have the perfect dynamic), and I have a quad that also works really well too, even though it started off first as a pair, then a trio, then a quad (and who knows, maybe more in the future).