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Chevy Express 3500
Those LWB vans are very different to drive over the shorter pick-up wheelbase of your current model. They are very massively marshmallow-y to drive. Perfect for highway munching but lesser fun the beaten track.
See if you can look for ones with the pop up camping roofs. These are often purchased by retirees and end up getting less use than they expect before selling on.
Time for a Dodge Promaster?