1, organizer& q/ A; E& |1 u2 B; Y
2, commitment 2 i( Y/ U w% u) [ ?3, every paddler is different, some are recreational, some are serious competitors 4 d: l {; d X1 E4, cost 4 b3 c# u, Z# Q9 N2 f5, fitness level: T* X! T5 D) _" v3 ^. g
6, whatever other factors