Definitely worth a try
Last year, I made some hand paddles out of one of those ubiquitous blue poly drums I found along my local river after a flood event and started using them a little last year and more often this spring. Had a great time running a local Class III run a couple of weeks ago and found it no more difficult than using a paddle. Here are some impressions:
Back-deck (aka rodeo) rolls are super easy with the hand paddles and seem even faster than when using a paddle (BTW, in nearly 30 years of kayaking, I have only hit a hands-only roll about three times so just the little bit of extra surface area does make a difference). If anything, rolls seem easier in the current than in an eddy... as soon as you are past the pont of no return, agressively go for a back deck roll in the direction you are flipping and you'll be up in no time.
You'll learn to use your lower body and posture to control your boat angle a lot more than with a paddle (hand paddling definitely promotes a good forward leaning, agressive posture)
For some reason, short rapid strokes on alternating sides (like when freestyle swimming) seemed to allow faster acceleration than using both hands at the same time. good to know when you have to get back to an eddy or cross a strong current
When surfing a wave, be careful of dragging an arm too far behnind you to rudder, you could definitely tweak a shoulder. I actually found that keeping the elbows in and bend and a quick dip of the HP near the hip, when combined with agressive lower body edging, provides all the rudder one needs. Spins are easier, if anything since you can really go for torso rotation.
When playing any feature, slow things down and let the water do most of the work.
Boofs are super easy since you can use both hands simultaneously and it is easier to maintain a strong forward posture.
My hand paddles are only about 1 to 1 1/2 inches bigger than my hand. They seem to provde sufficient power, but when I make my next pair, I'll probably make them another inch bigger. I think the creek-size power pawz are too big, but there are definitely a lot of people that swear by them.
"It's All Good"