If I had to take the car for whatever reason and bagged a deer then I would just call the wife up and ask her to bring the truck to me.
Another option would be to call up a buddy and ask him to meet you there.It would be a great asset as well because he can help you drag it out of the woods and load it.Who knows maybe someday you might have to return the favour.Also the plus side to all this is you have someone to share your hunt with and someone will be available to take lots of pics to remember the hunt .

If my suggestion is not an option then just put a tarp in the trunk