What size Trailer to Haul Two Spyders? What ramp angle?

[Onetrack97]

We ride only for most trips, but when we want to go 1000+ miles and then ride, it takes too long to get there and back when you don't ride the interstates.

My current need is to haul an F3S and a 500 lb motorcycle. But, if I'm going to buy another trailer, I want it to carry the F3S plus an RT.

What size bed would be required? What angle is needed on the ramp to prevent scraping?

I've seen a YouTube video of a guy putting a Spyder and a Ryker into an enclosed 7x14, but it's tight.

I'm looking at Aluma Trailers due to their low weight and our current tow vehicle's limitations.

Thanks,
Scott