I have always used a step stool from the 50 to the 150, 100, 180 long and now the 6' 180 tank. Makes life much easier!
My forceps are 12" and 6". I often forget to change tools when planting in the back of the tank and it is just fine, remember there is substrate back there, it isn't reaching over 24" and down 24", only down about 20".
I generally only work in the tank with pumps off during water changes so don't get too soaked usually. Pushing up sleeves doesn't cut it, always change into a short or sleeveless shirt!
My main issue is seeing what I am doing. I really cannot use tools near the bottom of the tank and look through the front pane at the same time so most trimming and planting is done with me looking from above.
I hated the wide bracing on the 100 gallon glass tank and had trouble getting to the center rear. Scratched up my arm all the time too. Dealing with 3 small openings in the acrylic 8' long tank wasn't nearly as bad and the 2 large openings in the 6' 180 are really nice.