> I've never had a mouse chew on anything inside my vanagon, the cabinets, on
> the cabin floor or my bed. They have only been inside the front passenger
> vent area. All other areas of egress seem to be secure.

This is my experience with my '87 Syncro Westy.  I hear them
up under the dash, then they dash all around.  I catch them with
a trap and throw the little devil's bodies out.  In the morning they
are gone, but there are coyote tracks....
http://jones.colorado.edu/jones/Utah05/three.html

I don't think they are coming in the sink drain, the propane lines,
the battery vents.  They are coming in somewhere up front.  They never
come in when I am parked at home, so I haven't got under the front
with the spare dropped.  They only come in in remote, beautiful places
where I don't want to do anything but watch the sunrise or sunset
or enjoy the place or the people or the wild horses.....
http://jones.colorado.edu/jones/SS04/MolasCamp.jpg

In twenty years of camping in my '81, never a mouse.  No radiator,
either.  They come in somewhere under the front of the waterboxers.

[Bob Stevens will agree 100% on this with me.  We are even
developing  recipe together.  We'll put it on Larry Chase's site.
http://roadhaus.com/recipes.html   Right, Bob?]

BTW--egress is great.  Egress is when I flip the trap out the
door to release the body....  It is ingress that I want to limit.

                                Richard A Jones
                                Boulder, Colorado