The TW-5/6 are heavy machines to move about.
If you do a fixed base consider adding an out-feed table even with the beam, like the SuperSplit. I actually lowered the out-feed a half inch and added the uhm -something (cutting board material which is very slippery). Any kind of table would be an amazing improvement, whether permanently attached or not.
Forklift tubes on SuperSplit. Also added a modified factory T-axle with go-kart spindles and a removable tow tongue under the engine. Orange tongue is leaning against tree. Now I can push it about more easily when storing, or backing up to conveyor after towing.
TW-6 wedge mod really improved splitting sellable size firewood from large rounds with less effort, less lifting and chasing oversize pieces for re-splitting.
Small improvements like your considering, really help in the overall flow of material in/out. The bottlenecks never go away, they just move. Then you refocus on that part.
You could make a base for the splitter to sit on, to both raise it and get forks or a pallet jack in. Of course a pallet jack would require a broomed off surface to roll.
Show us what you come up with Captjack.