Another option: if I put the camera in a bag that almost guarantees I will miss some photo opportunities.
I normally agree with Bob, and if you are someone who frequents WDW or doesn't necessarily stay out
all day I think that the 4MDH would also be a good option. For me, at some point during the day, I will have to put the camera away. We only go to WDW every few years and stay out pretty much from park opening to close---so every once in a while to give my neck and family a break, the camera will be put away (i.e. while we are in a restaurant eating dinner, typically I would put it in the bag for safekeeping rather than leave it out on the table).
The $6MDH is way too big. If I have to carry that much gear I need to do better at deciding what I really need that day.
Completely agree here. I bought the 6MDH thinking---piece of cake!! I can carry a full bag all day long!! I loaded it up with my camera, 4 lenses, an external flash and accessories and set out.
After lugging what probably equated to (or maybe just felt like) 15-20 pounds
all day in the sun, my shoulder was no longer interested in shlepping the stuff and that's when I decided a 5MDH for actual shooting might be better for me.
I realize now that carrying my D90 w/ attached 18-200, Sigma 30 and a wide angle is enough for one full day out. If I see something I think would make for a good macro, or if I rent a fisheye and miss a shot that I think would work well---I can always run back the next day.
Now, I use the 6MDH for storing my stuff, and the 5MDH for shooting. Still large enough that I can fit the body with attached lens and an extra lens + accessories, but still small enough that it's much more tolerable to walk around with all day.