are their reports on quality of the accessibility at the various campgrounds in Canada and the USA, I have found what passes for accessibility generally leaves a lot to be desired. I do a lot of traveling in North America and I am not impressed with what campgrounds call accessible.
I don't know about a list but it's important to make reservations if you're going in June, July or August. Just google the area you want and a website will come up with information.
This website is primarily about travel in Europe, not North America. But you could try posting your question here : https://community.ricksteves.com/travel-forum/beyond-europe
You'll likely get more info more quickly by following the PPs suggestion.
A good place to start is here: https://www.goodsam.com/campgrounds-rv-parks/
You do not need to be a member of Good Sam to use this directory. I have camped in all of the lower 48 US states and in many of the provinces of Canada. Campsites are usually easy to find except close to the major cities.
Are you looking at camping in national parks? Each state has a website that will list available parks and the type of camping available. If you are going this summer you better get hopping as sites get gobbled up quickly. Good luck
There are many directories on camping in any bookstore. You have private campgrounds, stste park campgrounds, national parks, US Army Corps of Engineers, TVA campgrounds.
Within an hour of my house, we bad have campgrounds in 4 state parks, 2 TVA csmpgrounds, a city park, two county parks and a Corp. of Engineer campground.
Try http://www.rvparkreviews.com - it's an all encompassing site that has national parks, state parks, rv parks, etc listed and if they have a "access/handicapped" services available.
www.reserveamerica.com is a great website for searching and booking sites. It has the whole country including state and national parks/forests on it. You can also look at availability calenders as you book.
recreation.gov is where you can make reservations at most forest service and national parks. You can select accessible site. If you look at a campground map it will show which sites are accessible. This is for the US. I've only made reservations in Canada through the Parks Canada website - https://www.pc.gc.ca/en/index
I love the moon books for finding campgrounds.
The "accessible" sites I know of have paved pads and driveways and raised fire pits. They are close to the rest rooms via a smooth surface. Do campgrounds on other continents have more accessibility features?