If I did calculations right, 4 booster HCLV version can put Apollo CSM + LM + custom made LH2/LOX stage (10 ton empty mass + 65 tons of fuel) into 250 km cirular LEO.
Calculated stage gave me 3.4 km/s of DV so if my data is correct on CSM and LM (45 tons total) HCLV is a feasible lunar rocket.
How are you attaching your payloads?
Are you using Attachment points / docking ports or are you doing a vesselstatus slave state?