Jason - Have you talked to the people at PnP? When I started doing the missions a few years ago, they sent me a
crate free of charge compliments of their sponsorship by Petmate, makers of crates. I just told them I was going to start doing missions and they sent me a
crate.
I have a -7A and I just checked on my
crate size. I got the Petmate "Large". The dimensions are stamped on the side, and they read 26L x 18.75W x 16.5H. Here's a link: I think this is the one I have, size large:
http://www.petmate.com/deluxe-vari-kennel-jr
That is probably the biggest
crate that can go in the baggage area. If you are going to limit yourself to just using the baggage area, you will greatly reduce the number of missions you can do. When it comes down to it, only the smallest of dogs can fit
back there. I've done maybe 10 or so missions, and only once did I use the
crate in the baggage area. I usually take the passenger seat out and make a make-shift bed using a few old blankets. Then I put the bottom half of the
crate in the baggage area and cover it with a thick blanket (old comforter). I can usually coax the
dog to walk under the seat support, and then I strap them to the passenger seat belt attach point. I give them just enough slack to lay down with a little left over. I have plenty of pics if you want to see what the setup looks like. It sounds like a lot, but it was all trial-and-error. Now, I can convert to PnP mission ready in about 30 minutes.