We mainly just go to Kinloch, as we have a holiday house there, about a 3.25 hour drive for us, which is about far enough with 2 young kids.
Love the place, quiet, peaceful, and lots to do any time of the year.
Great in summer with the lake, swimming, biking/walking tracks, and central enough to go on many day trips or 2 day trips from there, e.g. into Taupo, Turangi, Rotorua, or not far to get up to Tauranga.
And in winter it is close enough for day trips up to Whakapapa for skiing/snowboarding.
Maybe when the kids are older (over 10?) we may do overseas trips, when they would actually appreciate (or remember) the experience (considering its not cheap).
For now the kids (and us adults) just love going to the 'bach'.