I have had a VW camper for 15 years. They are great for two people as they are small enough to drive anywhere. We have taken ours all over Europe as a couple.
Even after having children we used it a lot, but now they are 3 and 5 it is a little more difficult. You need a decent size awning so that you can put the child seats outside at night. Awning also allows you to store bedding etc if you want to use the van during the day without spending an hour packing everything away.
However for days out/picnics etc they are perfect as there is so much storage, we are now using ours more as a day/overnight van rather than a holiday vehicle.