Hi Nate
Let me share with you what I know about Clan, I dont fish the place on a regular basis but I did stay in CPT for 7 years before moving to Gauteng and during that time I did spend a lot of time on Clan.
I am not sure what the dam level is like but I am going to assume in the region of 50 - 60%. Firstly you will more than likely be faced with extremly clean water which bassically means two things, you have to fish light (Not more than 10 pound line) and you have to make long casts! Red seem to be a very good color on clan, jerk baits in natural colors with red hooks I prefer Rapala Suspending Husky Jerk. Everybody change their trebles with red treble hooks to give a bit more color. Also topwater baits, Zara Puppy, Poppers and Skeeter Pop.From a plastics point of view, Super Flukes,Baby Flukes,Fat Albert Grubs,Senko and 4" Ring worms seem to be most popular.
Flukes & Super Flukes - Watermelon, Watermelon Red & Green Pumpkin
Fat Albert Grubs - Watermelon, Green pumpkin
Senko - White, Watermelon red, Watermelon
Ring Worm - Balck with chartruese tail
You fish the above plastics on a mojo rig or a carolina rig, Carolina more than 10 feet of water mojo less than 10 feet of water.
From a spot point of view you will probably do best by sticking to points and bay's if you dont know the dam well. Straight accros from the launch there is a bay and the point on the right hand side have a huge amount of rocks comming out far, be carefull if the dam is high you might not be able to see them and can damage a boat badly. This point delivers consistantly.
A little further up on the right you will see a big bay with a sharp point comming out again, worth fishing this entire bay.
Further down you will find a big bay on you left again fish the points and half the bay, this is a spawning bank.
Then I will definetly give the river inlet a go, if the fish is there you will catch a lot and big fish, best would be to fish the visible structure at the river inlet and also small points and rocky banks.
Good luck and keep us posted!