Originally posted by twitch K10D or a K200 sound like the ticket for you, both WR and price maybe mid $200's I think. K20 is slightly dearer, and K-7 dearer still. The 18-55 WR is the cheapest WR lens, the 50-200 WR the next cheapest.
First reply got it right already in my opinion. + 1 to this
Originally posted by Na Horuk Thanks for all the great replies, everybody! I'm finding it to be a little expensive for a one-time event, though. I thought 6 year old cameras will be cheap as chips, but apparently they aren't.
Moderately-used cameras like those twitch mentioned on KEH and other listings are a sure bargain, you may want to try those out. Expect a lot of shutter clicks though, and signs of use.
There are also some weather protection accessories you can use on your K-r like rain sleeves and other underwater casings, though they might not fit snug to your camera and make it look odd, at least they make your K-r and lenses weathersealed at a lower price.