Don't know if this is any help or not.
We towed by B & my G/F's Scout over 3000 miles last summer,on my 6x12, dove tailed trailer. Last 2 ft. were dove tailed. Each bike had room enough around them to hook up a bunch of tie downs & locking cables.
I did have them in staggered wheel chocks, the B was a tad back towards CG & the Scout was a bit fwd. of the CG so we wouldn't have too much tongue weight. Neither was against the front of the trailer.
If tongue weight isn't a big deal, off set / stagger them a bit & it should be EZ. You'll have more room front to rear than we did, due to my last 2 feet being dove tailed.
You should be fine. If its a V-Nose even better.
Stagger them, and angle them, what ever it takes to get good places for straps.
Your stable is gonna be busy.
Worst part for me was riding them on, hoping to get the spacing correct L-R. Then backing them off the trailer. When my feet lost contact w/ the trailer, I just let go of the brake & let it roll to level ground.