I agree most heartily with Carl and Paul on the Come-a-Long idea. It can be attached to the trailer, even to the trailer tongue/pole assembly if needed. They are quick and dependable. I loaded Ellie onto my father-in-laws trailer (tilt-bed) with a Come-a-Long and hauled it with my 87 Plymouth Voyager.
I am also of the opinion (learned the very hard way) that loading anything of any appreciable weight onto a trailer not connected to a vehicle is one of the more dangerous choices one can make when playing with tractors. .....
If a Come-a-Long is not your cup of tea, then here is a quick and proven way to do this. We loaded my daughter's Dodge Neon onto a rather difficult car trailer using this method. It is slower, but cheaper and will not damage anything.
This one at Harbor Freight is for demonstration purposes. My brother-in-law uses many different workload/breakload types of ratchet style straps on his 2 cranes and his auger truck. I use them all the time for work around the yard (usually his cast-offs which no longer qualify under OSHA rules on the cranes.. but are fine for working with a Cub) Use new ones for transport though... as tie downs.
2" x 27 FT RATCHET TIE DOWN
This will be more than enough to pull that 154 up onto a trailer. But be prepared, you hands may be a bit sore after the excercise. If the trailer does not have ramps, then you might want to consider renting a pair of Arched Loading Ramps.
Aluminum Loading Ramps - ATV Ramps - Motorcycle Ramps - Heavy Vehicle Ramps
Only one problem with the above:
Loading Ramp #LR13302  Reg. Price: $293.99 Sale Price: $248.99
This is an example. What the arch does is prevent a hangup as the tractor rolls up the ramp and crowns on the lip of the trailer or truck. Always a bug-a-boo. Make sure that you get ramps that will handle the weight of that 154. 1,000lb combined load ramps are not sufficient.. you will need at least 3,000lb combined load ramps.
Most local rental outlets have ramps.. especially U-Haul and other Construction Equipment Rental outlets. They also have trailers with extendable ramps..