This weekend I've rented the full set of equipment we'll be using. This will give us the opportunity to get familiar with it, both in general and in the specific context of our locations.
We have verbal agreements from all three cast members. I'm almost finalised with SAG (the person I've been dealing with there has been excellent). We have all but one location secured.
Biggest risks at the moment are: securing last location, bad weather, actor/crew illness.