I have sent a few things by pallet (series truck cab, set of wheels and tyres, running machine, engine block)
I have either taken the stuff to the depot in back of landrover and they fork lift the pallet out or a truck has come to collect (when someone else has arranged/paid for collection). The trucks have been BIG like a house removal van with a tail lift and the guy used a pallet truck to load onto lift.
I get a pallet and make it strong and put a plank n underside in middle so it rocks, that way I can walk it around with the load on. I strap down the load as best as possible and then I tightly wrap it with packing cling-film stuff (i picked up a big roll from somewhere and it lasted years). Then I make a couple of BIG labels with all the details on and attach one on pallet and one on the wrapping.