Long term storage options

[1SG.Rob]

I have an opportunity to take a job in Germany that will have me and my family moving there sometime late this summer. We would be there at least 5 years.
Before I accept it, I want to gather as much info as possible to make the best decision. One of those bits of information is what do to with my truck? I definitely do not want to sell it, nor do I want to bring it to Germany (though it is tempting). I'm curious as to what you all have to say about best long term storage options. Like how to prep the truck for storage, things to be aware of etc. I have family in the area, but none that have space for the truck, so storage location is up in the air also. Thanks!