I've owned open and enclosed and prefer an open trailer. I can store it at my house behind the fence and makes for a weight distributing hitch being unnecessary. I tow the BRZ / Miata with the F1fitty. I have a truck box mounted on the A-frame at the front of the trailer. That allows for storing jack, jack stands, fuel cans, random stuff. Tools, etc go in the bed, along with spare wheels / tires / cooler.
One thing I really like about the trailer, and sought out, are drop axles. Those get the floor of the trailer lower to the ground, so the loading angle is better. I don't have to rig up 2x10 boards, etc to load my car. I do have to jack the tongue to help with the loading angle slightly. And, because it's open, it's easier to load and tie down, for me. I grab the factory tie down / shipping points on the chassis and pull to the rear on either side, then the front eyelets for the front. My trailer has an open deck but that hasn't proven to be a hindrance or benefit either way. Oh, another thing my trailer has that is very important if you have drop axles... removable fender on driver side. This allows you to open the door to get in / out.
The trailer I'd really like to have is...
~ Aluminum (Lighter, no rust... considerably more expensive)
~ Open Car
~ Drop Axles
~ Electric trailer jack on the front for jacking the tongue to help with loading angle. I can engage that while I start unhooking tow straps (Speed to unload)
~ Truck box on the front A-frame / tongue for stuff. At least 3500# axles. LED lights.
~ Brakes on all 4 wheels.
~ Driver-side trailer fender that is on a hinge, and will swing out of the way without needing to be lifted / removed. (Ease / speed to load / unload)
~ Winch mounted to the trailer, wired up with heavy duty plug that plugs into the truck. For instance, a plug like what is used on golf carts to plug them in to charge. Requires wiring plug to rear bumper of truck.
~ 8 ply, Load Range D tires <--- Important. You may have to chuck the tires that come on the trailer and buy better ones. You will, sooner or later.
A few of those things are related to speed and ease of loading / unloading. When I load up at the house, I want it done quickly as I may be late to load up. When I get to the track, I need to unload very quickly as there are other things I need to do. When I'm loading up at the track to head home, I want that done very quickly, etc.
When you're at the track every month, all of this stuff adds up.
As for trailer tires... one of life's great hassles (the others being trailer light wiring and wheel hubs)... I have gone many thousands of miles with these tires. When I first bought them they were marketed as a Signet brand tire. Now Discount Tire sells them under a different name. HIGHLY RECOMMENDED.
https://www.discounttiredirect.com/b...radial/p/29484