John D.
The siderails will offer better load support if you have the verticals on the outside.
The load pictured, once split and stacked will fall well short of a cord of wood.
When you toss rounds in, get up there and stack the heaviest ones at the cab and work your way back, the truck will handle it better and you find the work gets easier as you get tireder.
When home, the small rounds at the rear act as a warmup so you don't strain so much when you get to the last big rounds in the front, heck, just roll them suckers off.
A brand new flatbed for single rear wheel is available for $1500.
4ton electric/hydraulic hoist is $2000
Loading an insert with a skidloader will crumple that sheetmetal bed right quick and the truck resale will plummet. Also, it'll present a bad impression to the customer.
I had a customer remark, " Just a few more sales and you can get a new tailgate for your truck", it has a small push dent in it, the kind you could probably vacuum suck out. The point is, the customer noticed it, and that can effect sales.
Just some food for thought.