It really is quite confusing isn't it? Which camera to bring with you? I too have a DSLR and a nice range of lenses that I've spent thousands on building. Then, like you, I decided that it's not always necessary to bring all that glass with me to every venue and outing so I also opted for the canon g12. Then I started bring both the g12 and the dslr and all the glass. Then I got an iphone. now what? All 3? For me, the iphone is always there. If I happen upon an unexpected shot, whip out the iphone for a quick shot. If I am going somewhere and I expect that I "might" want some "decent" shots, I opt for the g12. If it is truly a special event or I know that I intend to do some printing of the shots, it's an obvious choice....DSLR and I try to anticipate what lens I'll need given the event and venue.
Sadly, as I've added more options, I've actually taken less pictures. So, I guess you really have to consider your own personal opinions, how you view the importance and your needs. Personally, I should get my dslr out much more often and start shooting again. your mileage may vary.