How would you guys suggest getting by without a camera bag for:
Nikon F5
50mm
28mm
SB 600
films?
The camera is your problem; it's too big. Leave the F5 at home; get an FM or FE2, put one lens on it and carry it in a belly pack when you're not shooting it. Put the other lens in your pocket. Put film in another pocket. The flash should fit in yet another pocket. That (in most pants) leaves one pocket for your wallet, keys, and pocketknife.
I have a nice leather belly pack that I bought years ago, and I can carry either my FE2 with 35mm f2 lens, or my Leica M, two lenses, and a roll of film in it.