I've been reading a lot of post-apocalyptic fiction lately and watching some of those zombie TV shows, so when I saw a Top Gear blurb on the nuew Mercedes unimog, I knew that what I wanted for Christmas is a Unimog-based customized and luxed out RV. With front and rear 50-caliber remotely operated weapon stations to deal with zombies and a MK19 Mod3 40mm grenade machine gun ROWS to service your larger mutants. Plus, of course, you'd want tear gas cannons to fend off the starving masses, solar panels, water purification, biodiesel generation capability, etc. In sum, something like this:
But with lots of guns.