Try to enter the atmosphere following the prograde marker, then when you are decelerated to about 160 m/s use some Separatrons (look for C-130 assisted landing ) and you should be able to perform a secure landing
Have tried all kind of simmetry and point to attach them but it was still going to wobble, the only way to stop it was to put strut on two truss up and down the decoupler...
I've made this for you, it has ~8100dV, so it will be easy to manage, the only thing that change with the real Saturn V is that the lander is up when it should be down... https://www.dropbox.com/s/n76kvzfws2bvu8f/Katve-Apollo.craft
Little SAS/ASAS (0.65m) Payload fairings (maybe with improved aerodynamics? ) Better IVA implementation A sort of hot air balloons Bigger engines + fuel tanks (5m would be perfect) More EVA actions