For some of us, those canoes and kayaks are just too heavy to put on the roof or our vehicle or even on our trailer. There is an easy way I call the Glide Launch.
I highly recommend a Slick Rydr Trailer for this, I will explain why later.
Basically you just back your trailer into the water, untie the canoe or kayak, lift the bow (way less than half the weight) and glide the boat backwards into the water. Hang on to your painter line and pull the boat back to shore.
When putting the canoe or kayak back on the trailer, just float the craft most of the way to shore, pick up the bow and put it on the rear cross bar and glide the boat back on the trailer. With a little practice it is amazingly easy, even with a heavy boat.
Now, why a Slick Rydr Trailer rather than those very inexpensive ones or those way too fancy very expensive ones? I will speak from experience.
When you have a trailer that is properly set up, your gear is ready to go all the time so you get out more often and you can go alone because you won't need someone to help with loading.
My 8 place trailer gets year round use, including winter salt, and still no repairs and no rust and it even handles like a dream in high wind. Trailers just don't get any better or easier to use than Slick Rydr!
Take a look at the photos I've included. By summer I will have a short video on the Glide Launch.