Marc, thank you very much for your post, very insightful. Well this feature is non-union and definitely lower budget than most union greenscreen shoots. l am fairly certainly it will be unorganized in pre-production, just because most of the team on it have never done a green screen shoot...but I may be wrong.
In this situation they will probably ask me to set up an ADR type booth incase we do need to grab some lines. On previous productions with this group I've had to ask people not to say it was an ADR booth infront of the actors because they tend to freak out...
Sound has always come last with these guys, for example the last feature I worked on with them they had name talent, a $160,000 camera, and I got $100 a day and less than $100 a day for more than 20k in gear. I was of course naive and lost much more money than I had gained and it almost put me in the doghouse being a noob and all. This film is much different day rate wise, but I still will have to grapple with budget issues.
Anyway, thanks everybody for your help.