I've looked at unit studies for books like Lord of the Rings and Chronicles of Narnia - they cost an arm and a leg. So I just decided to do it myself - besides it gives me a chance to reread some of my favorites.
That's a great idea you have and I'd be willing to do the same.
These might help with the Laura Ingalls Wilder stuff:
http://www.sdcoe.k12.ca.us/score/little/littletg.html
http://falcon.jmu.edu/%7Eramseyil/wilder
I found both of those links here:
http://www.cloudnet.com/~edrbsass/edchildrenslit.htm
There's a course online for "The Hobbit" and "Lord of the Rings" at the following link:
http://www.houghtonmifflinbooks.com/features/lordoftheringstrilogy/lessons/
I printed it out last year, and one of my sons just finished reading LOTR, but we haven't gotten to the unit study yet. Some good ideas there, though.