We have the same problem with our truck being so tall. I am 5'2" and the top of the bed hits me about my eyes. I can't even see into the truck bed. We purchased a small 2-step stool and DH drilled a couple of Velcro straps onto the tailgate of the truck that holds the stool. I can park the truck, open the tailgate, grab my stool and pull the release pin or I can use it to easily climb into the truck bed. Either way, it's easy, it's out of the way. It might not last more than a couple of years being out in the weather, but it only cost about $20. I'll replace it when/if I need to.
