My Arctic Fox with basement has the floor starting above the wheel wells and is wider than the gap between the wells. There is enough room to house a battery that is wheel well height, but that is about all. There is no real way to reach in from the exterior side to access items under this sub-wing overhang nor do I see a good place to add a door in the wall or floor for access.
It seems this space is best utilized for things that can be loaded prior to mounting the TC and do not need to be accessed until the TC is removed. Access doors are easier if you do not have a basement and the floor sits on the pickup bed.
