Special tools,, nah. Imo, wearing comfortable shoes/hiking boots is one of the most important things. A hiking stick/pole can come in handy, especially at some of the gully crossings. As has been suggested before, small trash bags to put over your shoes if a water crossing is encountered.
I've found that even if it is chilly out when the hike starts, i usually warm up pretty quick. Maybe dress in a layer or two but try not to wear anything too bulky. Frog toggs or something light like that to keep the moisture off just in case it happens to rain could come in handy.
Speaking of rain,, it would add to the difficulty of the hike but as long as it's not thunderstorming, i wouldn't think it would cause too much grief. Depending on how much, it could raise levels at gully crossings which could become a factor. It would probably make the steeper gullies more slippery as well. I'm definitely not an expert on the area but i would think it would take ALOT of rain to make the hike undoable.
Bright orange is probably the best color to wear.
We usually have lunch along the way so be sure to bring what you like. Make sure to bring water!