I don't use bags, even though I have a weathered Billingham, I prefer keeping the camera in my hand with the strap around my wrist. (I do have an old SB15 flash that still works)!
I usually favor the primes lenses vs the zooms, one on the camera, and two in the pockets !
With digital, and for a long trip, the computer can be a hassle ! I might get an Epson picture wallet one of these days ( I used one once for a two week trip) as it is smaller and you can carry it with you instead of leaving it somewhere (hotel, office, etc.)!
I have the camera with me, always! Meaning that it's quite battered, being in various satchels (I'm on motorbike) with books and files...
I'm in the "no filter" camp, specially on digital cameras where those can induce some weird effects... But then filters in photography is like religion elsewhere, the pro and cons are very vocal about it :-)
Just to say that I've just got somehow a heavy flu of some sort and the computer's screen seems to move in it's own way... So I might not be very pertinent this saturday...! "What can I do, What can I write, Against the fall of Night". A.E. Housman
For many years I used a Nikon N90s, and did it the same way- a 50mm on the camera, a 135mm in one pocket and the 28mm in the other. Don't really like zooms. Since a midnight visitor invaded the boat and stole my small but nice Olympus digital, I may buy a DSLR--a Canon EOS 5D is the latest candidate, (prices have dropped to 1500 Euros) mostly for the sensor size. Dunno. Also, the new EOS 350 is a candidate. Capitalism searches out the darkest corners of human potential, and mainlines them.
Zooms make me lazy, especially at the wide to short telephoto range. I'd much rather use 20mm, 50mm and 85mm primes with a single long zoom than have just two zooms. Currently I have the Sigma EX 10-20mm to give me wide-angle on the D70s (effectively 15-30mm) but I don't enjoy it. Maybe if I tape up the zoom ring so it is effectively a fixed 20mm equiv ...
I still find it hard to go out with only ones lens and hate having to change too often so it does discipline me into roughly planning the shots I want to get. Ad astra per aspera
After the D3, Canon might bring out an interesting model ? It might be worth it to wait a bit that the dust settles ? "What can I do, What can I write, Against the fall of Night". A.E. Housman