i have put some thought to loading the tank and i've always managed fine with someone to guide me on but to try to do it alone would be tricky. if it had to be done then i could modify the trailer so the tracks would run in a channel which was one of my thoughts on buying a skelly trailer and converting it, as you would end up with a purpose built cromwell trailer. the down side of that being the trailer would be almost useless for any other kind of load and it is that reason alone that steers me toward a standard low loader trailer but then you end up back where you started with regard to always needing a guide. maybe like paul says a big winch is essential.