Agree. If there are relatively short cable runs (under 10 feet) and you don't have a huge source of RFI in the area, you should be OK.
Here's a rule of thumb that will help a lot: audio flies, MIDI walks, power crawls. Keep power strips and wall warts, which are horrid sources of noise, on or near the floor. Note which cables carry AC rather than DC; the latter won't create noise but the former can. Keep MIDI cable runs near the floor, as power RFI won't affect their data. Where possible, keep audio cables elevated - think of drawing a straight line from your keyboard to your mixer, with as little sagging as possible. Cabletying to your stands is an easy way to do this. When audio cables and AC power cables MUST cross, do it at a right angle, not parallel.
If all else fails, slap a direct box on your unbalanced outs and run mic cables to your mixer. In a small studio with well-dressed cables, I have only ever had to do this once.
I hope this helps.