For the love of cheap beer and canned cheese, if you're considering a big sit-on-top that weighs 80lbs so that you have fat-man stability and can carry your propane-powered toaster oven with you, consider a canoe. For the children's sake.
Seriously, kayaks we're originally made for Eskimos hunting seals. Light, fast, and just big enough for one dude with minimum gear. They've gotten more spacious over the years for sure, but I've paddled lots of kayaks, and those big sit-on-top are a DOG to load on the truck and carry up and down riverbanks. Rough to paddle too. Canoes aren't sexy any more I guess, but they were made to be light compared to the amount of gear they haul. I camp out of paddle boats, and kayak camping is similar to backpacking, while canoe camping is more like car camping.
My all time favorite 'yak is a Wilderness Systems Pungo. Light, fast, and plenty of room for all my saddle hunting stuff (weapon, backpack). Right at 40lbs and a joy to paddle. Killed a lot of ducks out of it, along with several hogs and a few deer.
My 17ft Grumman is an absolute warhorse too. I can paddle it solo in good weather or with a buddy, and it is plenty capable of holding 2 dudes and a big old buck. I bought a motor mount for mine too. Way easier to do a motor on a canoe, and you can put more horsies on it.
I haven't personally owned a pedal boat, but I know that they're heavy as a sock full of lead shot and expensive enough that you can afford a cheap, Bass Pro Jon boat and motor for the price of some of them.
This is all just opinion, and it's going to run counter to what most folks will tell you. But I've sold boats for a living, and logged MANY miles in MANY different boats. A $300 aluminum Craigslist canoe is cheap enough to at least try it. As much as I love my Pungo, if I had to choose between it and my canoe, it would have to go.