Does your splitter not pivot to a vertical splitting position? If not it sounds like noodling is the best way to go.
I am only 28 and messed my back up lifting big round into the back of my truck. That is when I started saving money for my splitter and 10 months later I bought one. I still noodle big rounds when they get over about 24" rounds, just to make them easier to get over to the splitter.
Tools I have found it hard to live without is; sharp chain and good saw, splitter, and a cant hook.
It would be nice if we could all afford some type of small grapple boom to lift the big stuff up on the splitter, or in the back of the truck.
--there's this nifty invention called "the inclined plane", or "ramp".
but I know what you are saying though. I don't have a boom or grapple, but I did build a box for the hayforks on the tractor, with a removable back. So right down to ground level, roll or flop in the big ones, put the back back on, lift the box, toodle on home with it. I don't do any giant lifting, simply can't, but once home I have various heights splitting blocks and can flop the real big ones over on to the shorter and fiskarize it then.
The only splitter I ever used had a log lift, and frankly, I can't see shelling out the large dollars (large as in $1,000 or more) for a gas splitter that doesn't have one. No fooling around with those whoppers, roll them into the lift, yank handle, up to split.
When I was using that trailer a couple weeks ago I just used an old pallet as a ramp to roll the ones in I couldn't lift up. That's lower than a pickup bed though....but...you can pull a trailer like that with the pickup, and keep your saws and gear in the truck, and the wood on the trailer.
Was at a store a few weeks back met some old geezer in the parking lot who had an engine hoist bolted to the rear corner of his truck. He said he used that to haul in anything from engine blocks to other equipment to big wood, whatever he needed. He said not expensive, but not sure how much that really cost. The boom on the thing was adjustable, the farther out, the less weight, but still..hmm..I am thinking the farthest out said 200 lbs, nearest inside was like 1000?? I forget now, more than enough for most wood rounds though. If it will do a v8 engine, that seems stout enough.