OP: you don't need the G10 or the G11 to take decent snapshots, these are going to be total overkill. Don't get me wrong, they are fantastic cameras, I just don't see them as being ideal for what you said you want to do. There are plenty of other options out there that are more suited to taking basic snapshots, and that will be more compact than the G's. Since you asked in this subforum, I'm assuming you're interested in a Canon. That's fine, they do make great cameras. Look for one that has a limited zoom (ideally about ~3.5x) and starts wide (28mm eq. or lower). A nice basic camera (very limited manual controls) that seems to have gotten favorable reviews (even underwater) is the powershot SD880 with the canon housing.
Good luck.