Just want to add that I strongly suggest getting a trailer with good rollers and not bed bunks.
For you, it sounds like it would be worth it's weight in gold. It will make life much easier splashing and getting the rib back on the trailer. I can splash and load a 6.5m onto a trailer with no problems by myself.
Here are examples of pole guides for a trailer making it much easier getting the boat properly lined up on the trailer without much effort, it's especially useful with a strong wind or current.