If the kayak is in the budget, you'll never regret going with that decision. You can still put the waders to use. You just shouldn't end up at some point later in life regretting that you never tried the kayak aspect. Don't let it be your would have, could have, should have story.
Get the yak.
Oh, one more thing; There's plenty of us here on the South Shore to hook up with. Yak Rats!!!!!!