You have some great information.
Dare we ask where you are??? What part of the world.
Water Temperature, air temp, reliability of the weather all dictate
what you wear.
Yesterday I was in full polypro with dry pants and a serious spray
jacket as we ducked around the coastline playing in surf. The precvious
week I was in sweat pants and a cotton shirt in a pond doing likely
what you are planning. ( footwear , Old sneakers )
My dry suit cost about $1,400.00 Canadian . If you are in the North
Atlantic that is needed ( It is at Kokotat for repairs right now too )
..
If you are comfortable and know you will not ruin expensive cloths in a
swim you are likely fine.
You can dump a tonne of cash on kayak stuff and need in in some
locations but I wear regular cloths and a PFD when I am doing what you
are suggesting.
What ever yo wear ask youreslf " Can I Swim in this.. ??? "
You should be fine.
Oh . Have fun!
Alex
http://pages.ivilage.com/mcgruer.com