When fishing with an indicator, I have heard, the rule of thumb for how far your indicator is from the fly, is 1 1/2 times the depth of the water. Problem with smaller streams and creeks is the depth of water can change quite abit in a small run. I also dont like to indicator fish on smaller creeks because you will miss many of the bites due to the time it takes for the slack get out of the line and move the indicator when a fish strikes. This is very evident when site fishing with an indicator. Many, many times I have seen the fish take the fly and attempt to spit it (what I call chewing it)and the indicator never even moved. With polish nymphing techniques, you keep your line fairly , let's say, "tight" with the fly while leading it down stream with the rod. You will feel every take instantly. I rarely nymph fish in slower moving water, and this polish nymphing style really works well in faster moving water.