I went in early September five years ago as a side trip while I was in SA for safari. Stayed in Livingstone and only saw the Zimbabwe side as I was told there wasn't much flow over the Zambia side. They didn't have the Univisa then so had to get a multi Zambian visa and a single Zimbabwe. Took a taxi to the border, walked through the building, and took a different car (same driver) to the drop off point. Did the reverse when returning. There wasn't a tremendous amount of stuff to do around so it was only one night.