Is 5 too many?
Main bag is my Dakine Mission Photo, big enough for 2 bodies and 4-5 lenses, pretty comfy to lug all day (even with a sigma 100-300 inside) and well padded. But not much room for anything else, sooo I just got a Dakine Sequence from Ebay.
Also have a Crumpler New Delhi 510 which I got as camera/laptop bag for work, and has ended up being just a very expensive laptop bag for work..sigh.
The there's the Crumpler Pretty Boy XL which is handy for K20 + 1 lens trips.
Finally for some reason I have the Kata chest pack thing which is really sturdy but uncomfortable to wear (and makes you look like you are wearing body armour, and gets very odd looks in the English Countryside).