"Would it be fair to say that using flaps on take off (flaps down) would allow a model take off in less distance?"
Yes.
Simple question, simple answer (no formula)
Link to real life (no formula):
http://www.youtube.com/watch?v=9WPb5k4-HnY
Link to practical use of STOL (Short Take Off and Landing) by experts with much practical background:
http://www.youtube.com/watch?v=bPSEl...eature=related