Try contacting your local gas and elec co. I believe they will have all the answers you need

yeah...Entergy is going to help you out! LOL!
they do actually have a program in N.O. through
Entergy using local energy raters.
a little biased, but it is what it is.

below is a copy & paste link to LSU AgCenter's study
about insulating floors in homes with open crawlspaces.

http://www.lsuagcenter.com/NR/rdonlyres/D33F711D-DC4B-4E4C-9ED6-A97DCE9DB026/79806/pub3187insulatingraisedfloorsHIGHRES.pdf

I plan to insulate my floors with closed cell
3" everywhere...not average fill.
once floor in bathroom is replaced and
plumbing is finished.
your biggest battle is going to be getting
3" everywhere, and not just averaged fill.
plan to crawl under house before they
leave. take a piece of wire with inches marked
on it and a can of spray paint.
have them come back and touch up low spots.

knowing the foam companies you'll have to
deal with, plan on double checking the work
and not relying on their word that it is right.

understand that closed cell is about R-7 per inch
so 3" is R-21. actual R-values not quanitive values
are what is important.

best of luck.

This was very helpful. Thanks!! The report mentions the termite issue . . . I hadn't even thought about the termite contract - I need to get with them before I do this.