PVC is really a great way to go and you can lift it out of the truck easily. Also it doesn't hurt to get wet so you can leave it anywhere. I use a bottom frame glued together and I added some small eye hooks to strap the different planes down. I added "T"'s (4 on each side) and added padded uprights stuck in them to handle the wings of the larger planes. Don't glue these in as they get in the way of the smaller planes. I carry them with the main wing already secured to the fuse.

If you want to run 12V power from your truck battery to the rear, make sure you add the 30amp fuse as was previously mentioned. Wires can rub under the truck and leave you stranded when they knock out your electrical systems. Also don't skimp on wire size. You will need 10 ga wire to start those bigger engines. Solder everything to eliminate future headaches.