Besides O.Chem, I would imagine a lot of us had different textbooks from both AP's in high school and basic science courses in college- so I would say that most of us had experiences with two or more textbooks.
Also, I don't mean to be a grammar/spelling-nazi or anything, but you spelled two of those authors wrong- it's Ouellette and [SIZE=-1]Zumdahl[/SIZE]. It's just kind of surprising because you said that you've been on these committees for book selections...
Otherwise, I do agree that you should go with Campbell for Bio and Zumdahl for Gen Chem. I've used 2-3 different textbooks for both classes, and those are the best in my opinion. Also, I think that's the general consensus from what I gather from SDN, amazon.com, and my high school/college friends.
For O.Chem., I (along with other people on sdn) have had my good experiences with Wade. I think vast majority of the colleges in the U.S. use Wade because it's the most straightforward with clearly drawn out and well-organized mechanisms, etc.