G’day Norm and all
I do really like the powered jockey wheel trolley idea. I’d adapt it to my setting if I thought it’d work.
The challenge here is to climb a couple of severe inclines with less than ideal surfaces. Another idea, given the shortage of suitable inexpensive tile elevators, was to build a couple of carts with a central pivot for a load bucket. That way the wood wouldn’t fall out.
Like you I thought to use some old ride-on wheels on a frame, in my case, so they’ll be less likely to get bogged. The trolleys could be winched in a train up to the house and then spooled out back downhill for refilling.
It’s great to see someone else working out a solution to a similar problem. If I can get the essentials done here it’ll serve as inspiration to get on with it for me.