If it is fair for a good parent (usually the dad) to get the kids every other weekend and some holidays then it should be fair for the other parent every other year, too. It isn't idea for kids to have two homes and two schools but it isn't idea to live with one parent and rarely see the other, either. 18 years max, isn't really that long and it's not about the parents but the kids. They need a mother and a father.
Thanks for your input, and I agree. The whole point of separating is to get along for the child. Parents need to realize that. Sure, it's easier to hold a grudge, but hey, getting out of the relationship is trying to tell yourself to move on, already. Emotional baggage serves no one.
Children are more resilient than we think. Having two homes and two locations actually can be like having twice as much of everything.