I store 3 of my vans in my barn for the winter, including my 91 Westfalia.

I don't overinflate the tires, nor do I disconnect the batteries, as I
start each vehicle every week and every 2-3 weeks drive each one a bit.

As far as keeping out mice and chipmunks - I've never had them enter the
interior of the vehicles, but I do know at times they go into the engine
compartment. If you can figure out a way to prevent them from doing this,
let me know. The best insurance I have found for discouraging these furry
rodents: a big barn cat.

One thing you don't mention that you do for winter prep that I would highly
recommend for cold-weather storage: empty the Westy's potable water storage
tank.

Michael J Vickey
vickrail@velocity.net

85 Vanagon PkUp DoubleCab
87 Syncro GL dk gray
87 Syncro GL dove blue
91 Westfalia GL Camper dk blue
93 Eurovan MV/Westfalia top wht/blk (FS)
93 Eurovan MV tornado red