1, organizer( ^+ |- g9 b1 ~. P* Y6 r
2, commitment. p/ U. _% C: Y0 C4 v1 b2 U
3, every paddler is different, some are recreational, some are serious competitors4 k$ y4 z: t. c4 I8 H
4, cost * d$ g1 v( X2 A- X5, fitness level& d, u5 w* B" t5 e- w
6, whatever other factors