1, organizer/ i' J' n5 k' X
2, commitment + K5 l' Y( W3 B! F4 s$ R* m: z3, every paddler is different, some are recreational, some are serious competitors+ I6 P% n' V" m
4, cost ' Y) i# c5 q& n% f, o L, ]1 W5, fitness level ) t2 R4 U5 I* O. ?/ Z @& |8 V6, whatever other factors