I agree. A 4'8 layout can be run effectively fro a single set of feeders. My son's 8x8 layout works fine e on a single pair of AWG22 feeders.
So many people advocate redundancy ("add a feeder to every section of track") that they make it sound horrible complicated. While this does add a measure of risk avoidance, it isn't strictly necessary. As long as you are consistent with the polarity of your feeders, and isolate any reverse loops properly, it's hard to go wrong.
Connecticut Valley Railroad -- A Branch of the New York, New Haven, And Hartford
"We don't stop playing because we grow old. We grow old because we stop playing." --George Bernard Shaw