MISSION SUCCESS! Lord almighty what a trip. Followed a combination of tips from here. I combined an unmanned mk1 with the Stayputnik and put 4 batteries on it. The landing vessel was 4 medium fuel tanks with the small landing engines on them. That was powered by a stage 2 set of t800 fuel tanks with the steerable engines, which again was powered by a stage 1 set of 5x rockomax fuel tanks with the engine that comes prior to the mainsail, along with some thrusters. The landing on the Mun actually went relatively smoothly. I packed so much fuel that I could bob up and down some 1000m above the surface until I came close enough to thrust retrograde and slow down. In the end I landed about 800m from brave ol' Bill. On one t400 engine I set course for Kerbin, which went almost perfect, except for the fact that I ran out of batteries half way there, and couldn't control my vessel without activating engines, which would've set me off course. Thankfully my entry angle was low enough to not burn up on re-entry, although my batteries exploded (my heart sank for a sec when I thought it was my pod). Landed smoothly on Earth, with Bill bringing home 267 science point, and transmitted another 200 or so. What a guy. I'd say he even rivals Jebediah.