I've always worn wetsuit booties on my kayak--first with a farmer john wetsuit, then with paddling pants over my wetsuit, and now I wear them over my drysuit. But they have floopy soles and zero arch support...which I'm learning is inadequate for pedaling a Hobie. I want something warm with solid soles to wear over my drysuit. Any recommendations? Thanks!

One thing that seems to help is pedaling more so with my heels on the pedals. Pedaling with the balls of my feet on the pedals is hard on my knees. Wish I would have thrown away those stupid foot straps back when 02B told me too.

I use Sperry Sea Hiker booties. They have an angled zipper that allows my foot to slide into easier.
No regrets.
If you don't mind color, you can get them for 45% off. Just Google it.
http://www.sailingproshop.com/Products/Sperry-SeaHiker-Boot-GripX3__SP-0308288.aspx

I have bad knees, (3 surgeries) and suffer with plantar fascittis, so this has been an issue for me.
Like Salty, it helps if I adjust the seat and pedals so that I don't peddle on the balls of my feet.  I tried booties, water shoes, and even thought about using my wading shoes, ( too big ).  Arch support is a must for me so my solution has to use a "Superfeet" hard insole inside whatever I use.  I bought a pair of those Chota boots, not the long mukluks, from Derrick A2H.  They have a fairly hard sole, and with the Superfeet insert they have been my best solution so far.  Kept my feet warm last GS6 in that 48 degree water too!

I always used to have the pedals set to '5' but have found '4' to be easier on my knees & I get more power too. I'll switch back to '5' if I'm tired sometimes just to change position.