A snowman rig is basically a normal hair rig but with a longer hair, long enough for two boilies instead of one. What you do is put a normal bottom bait on the hair FIRST, then you put a pop up boilie on aswell. This creates a bait the is neutrally ballanced. Basically this means that the bouyancy of the pop up boilie counter acts with the normal boilie making it not so heavy. So now you have a bait which is going to fly into the carps mouth as soon as it sucks near the bait. I use orange coloured tutti frutti pop ups when i fish there. they seem to work pretty well

Also the bottom of the lake is mainly sand and a light coloured clay with the odd weed bed and gravel bar here and there. So go for a light coloured braided hook link, or even better use the new Korda IQ hooklink