I should say, you do have to do a little hanger shuffle with ground vehicles and main ships, since they currently are elevatored into the hanger via the same system:
1. Call up the ground vehicle(s) in the hanger.
2. Move it off to the side so it is clear of the elevator.
3. Call up the desired ship.
4. Load the ground vehicle into the ship and head out.
In 4.2 they are adding support for calling at least the ATLS mechs from the freight elevator system that is inside the hanger. That way you can just call your desired ship, then use the freight elevator to call up your ATLS and you can then load it into your ship. Not sure if they plan to support that option for other ground vehicles but I hope they do.
Either way, even the current combined personal hanger system is leagues better than what we had before. Previously ship vs ground hangers were completely separate and you had to combine your items outside the station somewhere. That was goofy and never made sense for solo play imo. Way too time consuming.