If you use the Univair STC it gives you access to other STC's that they have that you may want later that require the conversion to have been their conversion in order to use them.
There are drill bits designed to specifically drill plexiglass. They are worth it!
A hanging water bag with spout to fill locally and hang from tiedown ring. It's like having running water, for brushing teeth, washing hands, making coffee, limits hunting down and carrying 20 lbs of water bottles. With kids especially, it'll be handy. bring stout tie downs, weather can get ugly. Have fun. the kids will never forget it!!