Most C & B revolvers have six chambers as do SAA cartridge revolvers (unless it's a "pocket model"). At any rate, just leaving the hammer on an empty chamber. That was done for many many years and still is. The same as when I load up a SAA, the hammer sits on an empty chamber. Unless your handgun has a cross bar safety, that's the only way to go as far as I'm concerned. Been doing tit that way for 50 plus years.
Not to be critical . . . but from you question about putting caps on all at one time and revolvers with more than six shot cylinders, it leads me to believe that you need to do a lot more research and studying.
What is your reason for leaving your revolver loaded? Are you thinking a home SD firearm? if so, there are many more better options such as a modern revolver or semi-auto . . . or shot gun for that matter. Why do you feel the need to have more than six shots?
ANY loaded handgun, whether it be percussion or cartridge can be a problem as far as accidental discharge.. . . and usually by "operator error". I a cylinder in a C & B is capped and the hammer is on it, even in the half cock position, if circumstances are just right and it's dropped, you could have an accidental discharge - the same with a cartridge revolver. Rare . . but it could happen.
Another thing to consider is your individual circumstances. As a firearm owner . . . it is YOUR responsibility to know where that firearm is at all times if out of your control. While some may think of dropping of a handgun causing an "accidental discharge" . . . I also view accidents caused by mishandling - whether it be by you or a child who happens to find it and decide to play with it as an "accidental discharge" - either way, the results can be the same.
My thoughts are that if a handgun is used for SD or CCW, then yes, it should be loaded and ready to use - but again, it is the owner's responsibility to use good judgement, know where it is and keep it within his control. If it isn't going to be used for such purposes - why the necessity of keeping it loaded? Some may disagree with me and that's fine - but I don't classify C & B revolvers as SD handguns. There are far better alternatives out there, especially if going up against a perp who is armed with a decent weapon. And your concern about more than six chambers leads me to believe that you are possibly talking using it for SD?
Again, not to be critical or upset anyone nor your inquiry . . . but a bit more information on what you plan to do with it, why you want to keep it laying around loaded and why you feel the need for more than six shots would be helpful.