Amazon has the CampBuddy Automotive Inflatable Air Mattress for $33 with free shipping. Features two pillows, pump, bed measures 52.7" x 34.3" x 16.4".
Amazon has the Allen Sports Deluxe 2-Bike Trunk Mount Rack (102DN-R) for $40 with free shipping. List price: $60. Features fits sedans, hatchbacks, minivans, and SUV's, side straps, individual tie downs, 70-lb. max capacity, padded lower frame.
Has good Amazon Reviews.