OOOH...this brings back memories!
We have no children but dogs and cats, moved from a 2 bed house plus office back in July.
The way we did it was to pack all our personal effects, office equipment and small furniture into a long base van from the UK, which we then drove over. If you do this DON'T forget to complete your customs forms. When we drove to Basel we didn't know we needed them (how niave) but they could clearly see what was in our van and how innocent our mistake was so they waved us through. They could have asked to have the whole van unpacked
My OH had to be in CH for work so I stayed behind in the UK and sold everything through ebay, the local paper and freinds and friends of friends. It was hard to see things that I love go...but they were too big for our new place in CH. Plus we thought it much easier to buy things over there and have a fresh start.
So the van and OH half went over end of June and I went over with the dogs via Swiss 2 weeks later. We rented in the UK so it was a simply return of the property to the landlord.
It was short but very tiring. Imagine 13 hours drive twice over plus flights. The cost was cheaper than hiring professionals but more hassle.