I have never had the town (you don't have to go to DMV in Maine) ask me for a title on a trailer. Even when I bought a brand new 5x10 Utility trailer in 2011 I registered it with nothing more than a bill of sale. I think the issue is value, maybe not. I could be talking out my ass here but given that I have registered boat trailers and bike trailers etc without a title I'm thinking maybe it isn't an issue until you get into RV terrritory ?
Whatever the case, you've got a bunch of good ideas here on how to deal with it. As too the ramp, without seeing the ramp itself and how it is carried on the trailer when not in use I couldn't help you with an idea on how to make it not rattle. If you want to post a couple of pics of the ramp in use and stowed, I'd be glad to take a crack at designing a way of keeping it quiet
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