1, organizer ( F. X) E7 Q0 O8 o* \2, commitment! o g% r) c+ e) x) P
3, every paddler is different, some are recreational, some are serious competitors 0 w, I$ ^$ X) ^: J) _4, cost2 f$ R2 i7 C/ G# G) R' p
5, fitness level) d$ Q$ z) A' B) ]# |5 _) R- O
6, whatever other factors