Bought a 2 bike garage organizer stand. Zip tied it to the deck, and straped the bikes down. Also have the wood straped on the front so no bugs in the Durango. We will probably buy another stand, put it on the opposite end of the deck for my wifes bike and one spare for when she brings a friend. Next year, we will probably get a plastic truck bed box for extra storage, and that will take up all the space I have LOL.
Here is a link to a couple of pictures.