When my gear is dry and clean at the start of the trip they have their own containers. At the end of the day on a stream the wet gear goes in the back of my truck. Plastic tubs are great for gear being used all the time.
Choice of vehicle depends on too many variables to have any perfect one for everybody. Single men and married men are going to choose differently. If you are a back country explorer then you'll want a different vehicle than if you are mostly driving in the city or highways. Hauling a camper into the back country over 4x4 roads can be a chore. Hauling a trailered boat over gravel roads is also a chore... and hard on both the boat and the trailer.
Just like boats, there is no one perfect vehicle. First you have to examine your own personal life style.