Well, it’s not against the law. And you probably won’t die if you do. But my strong suggestion would be ‘no’. Why? Three reasons: the portages, the portages and the portages.
On big lakes like Opeongo, Cedar, North Tea or Kioskowkwi, you’ll be glad you did. Assuming you never leave those lakes because the minute you want to portage to another lake your outlook will change somewhat.
Spiffy, light weight sea kayaks weigh as much as heavy canoes. That is to say around 30kg or 75 pounds.
You have to have some way of carrying your gear too. In most sea kayak rigs, your stuff is parceled up into itty bitty dry bags and jammed into tiny compartments fore and aft. Unload them all and you’ve got a jumble of stuff and no convenient way to carry it. So you would have to bring an empty portage pack.
And speaking of things that do not carry well – the boat itself. Now they do, apparently make detachable portage yokes for kayaks. So at least there’s a hope you won’t have to sling 70 or so pounds over one shoulder. But you don’t see a lot of them. Algonquin Outfitters, for example, will rent you a PFD for your dog, but doesn’t list ‘kayak yoke’ among their gear offerings. MEC doesn’t sell them.
But of course MEC and many outfitters do sell wheels you can stick under the kayak to push it across the portage like a one-handled wheel barrow.
Which sound great except that roots and rocks that you step over without a second thought while walking a portage trail will cause your cart great difficulty.
I have been on an interior park trip with a sea kayak. It was penury. And it delayed us significantly, having to make three trips to move one person, his gear and his boat across the portage.
I have come across people doing interior trips in kayaks. They seemed miserable.
The comment section is open if you’ve got another perspective. I welcome it.