IMO the Champagne seems to take away pattern except in orange and green tones. Look at the champagne combo pictures on WOBP;
There are a few morphs that seem to shine thru the champage; enchi and orange dream are great examples but some of the darker morphs like Leopard seem to come thru as well.
I just bought a champ poss het red male today on a whim and started checking things out but so far thats what I see....
As for the Champ Clown, I think the enchi/clown/champ project would be the ideal way to go; you still win even if the clown gets drowned out.
Best of luck!
Cheers
Albe