I like the idea of the vehicle-as-planter.

Wildlife charity actually tends to remind me these days of my other friend from Omaha (coworker), as she talks of those issues and her interest in them a lot. My tendency, unlike disclaimerwill's, is to think of charities benefitting humans and issues of injustice as most worthy. But I do like to root for the underdog, and wildlife is certainly an underdog on the planet, thanks to our dominance.

Hey, now that I think of it, your old Jeep being reclaimed/taken over by flora and fauna is a nice symbolic statement of a sort.