All good but:
There are NO bungs so I did not forget to install them
I have a 65 Hp tractor with a jib, an 8 KVA generator, air compressor with a long airline, 3 4WD vehicles, 2 heavy chainblocks and yes, they could all be taken down to the dam in the box trailer.
Digging trenches for the trailer wheels might work using the rear scraper blade but I do not have a backhoe or FEL However, the slope is minor so it would be far easier to get some water out of the boat to raise the stern - then the loading angle will not be excessive.
The stern is too far off the bank to reach with the tractor jib and there is the added danger of losing the tractor into the dam too!
The stern sections of the hulls cannot be sealed to use airlines, but yes, inner tubes (that I do not have) could be placed inside or under each hull. An inflatable air bed under each hull might be better However, the water at the stern is around 5 feet deep and the temperature this morning was minus 5 degrees C. I might be a wimp but getting in there to place the inner tubes/airbeds then connect them to the air lines etc is not my idea of fun, even wearing a wet suit. Al up though, this is starting to look like the best option. Once the boat is moved as little as 6-8 feet forward the hulls will probably start to drain naturally, depending where the holes are located