I was going to skip the Ontario part & go thru Ohio. Which route is better/more scenic or interesting?
I have only done the Ontario part. The ACA guided tour does Ontario too, reportedly just to see something different other than endless corn fields. You'll see enough corn fields to last you a lifetime in Minnesota, Wisconsin, Michigan and Ohio. The Ontario segment is fairly low on services, but with proper planning you should be able to find what you need. Planning is the key--don't rely on just riding until you see something.
I haven't used the ACA routes yet so wasn't sure about traffic & how busy they can get.
No route is perfect when it comes to traffic. Every route is going to have occasional segments of roads that are busier than you'd like. But the ACA finds as many of the low-traffic roads as possible. Many people are tempted to take shortcuts on ACA routes, and there are plenty of them to be had, and they can save you a lot of hills and distance, but you will almost always pay for it with increased traffic.
I thought of camping but don't want to deal with the hassle of packing all the extra items along. Plus, I do like my creature comforts - especially if the weather gets nasty!
Carrying camping equipment does offer you a lot more options. But in my opinion, it's not worth carrying camping gear unless you plan to use it most of the time. Camping gear is heavy.