Volks,
Just wanted to report back that my recent camping event here in South Florida was made very comfortable by having the A/C unit hanging on the side of my Ziegelstein.  Thanks for the tips, plans and info.
While I'm recovering from the bazillion or so gnat/mosquito bites (and that's WITH deet applied :-), I'm happy that the A/C modification works like a champ.  I'm going to work on some modifications to the mount and I'll post some info when I get that done.  But, for now, I'm good to go any any warm weather situation.  5200 BTU's make sleeping much easier -- our low temperature was something like 80-degrees (F).
Thanks for all the info!
    -Robert