That is how I usually do it with most rounds, either build a ramp or use smaller lighter rounds as stairs to "walk" up the pieces, less strain on the back. These were a little too big for that, they were in the 36"-40" range, but not very thick so I could get the tongs to grip. I left the tongs attached and just lowered the bucket and moved the pieces around until quartered or smaller.
I have also tried a different method where I left the round on the forks standing upright, and brought it to the splitter from the end, not the side like usual, the lowered it in front of the wedge, forks straddling the wedge, then used the ram to split. The advantage was the ram pushed the splits back into the bucket, and the pieces still rested on the forks, so I could easily slide them back towards the ram for the next pass.
In the photo, the red forks are holding up the round, straddling the beam, this way I picked up less pieces again to resplit smaller, most went into the bucket.