You guys missed the very last line of my post. I need a tag trailer. My trucks are set up with full length tool boxes down the sides of the beds. The Raptor 3018TT is a tag and has 18' of cargo on the the long side. Again it is not 16' of unobstructed storage. It would work however it is not ideally what I want. So far I found three other models that have the space I'm after.
As for the dedicated storage space you are correct I will not find that in 16' (I did find 14').
I will be giving up my 20' enclosed and possibly the new 28' I'm looking at to purchase a toy hauler. SO it needs to do what my other trailers currently do and that is haul four bikes. Two Harley's (Big Twins) end to end with wheel chocks need an honest 16'. It is a tough position for me to be in however if I'm going to do this it has to do double duty as a event trailer and a weekender with the family. I have considered just a travel trailer but that shoots the bike hauling in the butt. I did kick around a motor home however that would be a near impossible sell with Mom.... I don't mind the bikes in the living area while traveling as I'd be with the guys and if they can't handle it they need to man up.
