Well, I've gone as far as I think I can with her tree. I'm short 1 Great-Grandmother and 4 Great-Great Grandparents, but it's much better now.
The missing Great-Grandmother - I have plenty of information on her, but there's one document that troubles me. She is reputedly Pemela, Pamela, Permela, Permelia and some show Carmela for her first name and McIntosh for her last. BUT - there is an 1851 New Brunswick Census that shows her living in N.B. with a 6 month old girl named Ann. Now I can't tell if she's single with a child and no father in the picture, or if she's married and the father isn't on the Census (she's listed as a servant with her child in the household of the family she serves), or if perhaps she's divorced at that point. By 1851, she would have been 30 years old, so anything is possible. It does appear that she married John Wells soon after that as they started having children by 1853.
Either way, I can't find the parents of John Wells (born 1813 in England and immigrated to Canada) or Pemelia McIntosh (born 1805 in Ontario), so I'm not sure how much good it would do to add her as a McIntosh (as I've found most family trees have done - taking the easy road) or wait and try to add her with a LNAB that is proven. At the moment, I'll leave her blank.