Oh God I had a hard time today. So I had to send my new Mun base up in pieces, and since this was a land-based refueling station i needed a large tank for fuel storage. Problem was, i designed the station with the large docking port on top.... Since i already had it landed i had to land the tank ON TOP OF THE BASE! First i tried a straight on landing, couldn't do it. then i went to landing nearby and RCS-ing it on top. Took me about 30 tries, with my funky controls, low on RCS and the fact that the docking port liked to pop off at every opportunity. Glad i got that over with.... Base came out well, has 4 fuel transfer rovers so i just land things, drive up and refuel and take back off, Transferring around Kerbin, then the Mun again. No need to worry about refueling in orbit.