My wife is part (a small part) Abenaki, and would like to know more about the art of that tribe. What are some good resources - books, museums, websites, etc? There's a ton of stuff for the more Western tribes, but much less for those of the North-east.
I can only comment on a potential museum that you might be interested in contacting.
When I was a park ranger up at Acadia National Park, I occasionally assisted with programming that was a partnership between the park and the Abbe Museum. I always found them to be quite knowledgeable, professional, and their exhibits are top notch. They are a museum that focuses on Wabanaki history, culture, and artists.
They have a number of exhibits regarding Wabanaki artists (which I understand includes the Abenaki). They might not have a ton of information online, but they are an excellent resource if you are ever in the area.
You might consider contacting the Abenaqui community of Wolinak (https://caodanak.com/). They also have a museum (http://museedesabenakis.ca/data/) where you might also find contacts to pursue your exploration.