Quite honestly if there are 10 codes there I would erase them and see what comes back. There is some likely hood that they where set inadvertently. Most of them wouldn't give you any driveability symptoms per say.
Typically egr codes are set when there is deris stuck in the pintle. The typical symptom is no idle and a hard brake pedal depending on how for its stuck open. The other possibility is one of the coils is flakin out which will cause it to be in a different position than expected by the PCM.
The cat inefficiency code could be the cat has worn out and is no longer functioning as intended. There is an O2 sensor behind the cat that monitors how well its cleaning up the exhaust. If it sees higher numbers than its expecting than it flags the code.
The cam sensor, Hmmm I have never personally had one of these fail. If it was unplugged at some point than it would have set the code?
The vent solenoid is either attached to the charcoal canister or on the other end of the large rubber hose that comes out of the charcoal canister. Its to late to remember. They are not terrible expensive and I'm pretty sure the dealer is the place to get them. Small and medium evap leaks can be just about anything so it may not be a bad idea to have it checked out before dumping cash into it. Although I don't they they are that much.