James, you've gotten a couple of really good responses so far. If you still have your tree on Ancestry.com, it won't be as hard as you think because your sources should still be attached to each individual and you can obtain "sharing links" from the ones which have images by clicking on the little crossed hammer and wrench icon next to the image, then click on "Share" and choose one of the platforms to get your link. I use Facebook since I am a member there. Here's the thing, though--do not actually send the link to whichever platform you choose. Instead, close the pop-up and you will get a smaller box with the URL for the shareable link which you can just copy and paste into your citation, or use in a template as Ellen pointed out.
Indexed records, unfortunately, do not have shareable links, but are still usable. Instructions, also, on how to use templates for them were pointed out by Ellen.
Use your census info to find the equivalent image on FamilySearch (or other free site.) At FamilySearch you have a source citation to copy/paste and you don't have to struggle to format your own citations, plus, the image at FamilySearch is accessible to everyone. FamilySearch also has the SSDI with a source citation to copy/paste.
Personally, I would dump all the sources which refer to Ancestry Trees. Most of those trees will probably be inaccessible now anyway. Also, the information in those trees are only as accurate as their sources and you want to use the sources here not the trees.
There are some sources you can find at Ancestry which cannot be found elsewhere on a free site. If you post here on G2G, there are those who will help you construct a good citation for that source. For example, most World War II Draft Registration images are not on FamilySearch but are on Ancestry.com. I have a file in my documents with how to construct the source citation for them (which I would be happy to share and let others critique.)
All the best to you as you get back WikiTree and improving your tree here!