Make sure you have alot of lift to account for your mass, and make sure the center of lift is just behind (hugging) your center of mass.
I started a mission to land a solar powered rover on the Mun.
^This is the ship design I went with. Alot different than what I'm used to.
^Got it into orbit and begun refueling. It's very difficult to dock on a laggy computer.
^Half way done. I hope this works.