Apologies for this TLDR question: Do I need to run the client on each comp where I want solo (gpu)?
The only way to solo mine with a GPU is to run your own pool, since the built in daemon miner can't GPU mine and the GPU miners can't connect directly to the daemon. As I am looking at setting up a pool I may have more advice on this later. EDIT: I see exciter0 posted some instructions. Thanks exciter0!
Likewise, if you run your own pool you can have as many of your own computers connecting to it as you want and you are still effectively solo mining.