Thank YOU ! We are looking at aluminum trailers as well. Do you feel the 16' better serves the need than a 14' ? our Sport is 10.5' long .. since we know nothing...we are exploring all our options.
A 16' is the minimum I'd consider for hauling. As the three bears say, It's not to long, it's not to short, it's just right. FWIW, in addition to the LJ, I also have a TJ Sport that gets hauled on the trailer (one at a time of course) and, from my perspective, it fits nicely, leaving room for for other items.
To be clear, Gottagofast hit on another important item to consider, i.e. do you have a safe place to store a trailer when not in use? If so, then it's a good option. If not, flat towing would be a cheaper and better option.
Lastly, trailering does also mean some work on your part. You have to hook up the trailer, load the Jeep, and strap it down securely for transport. At this point I have it down to a science and can have everything ready to roll in under 30 minutes. If you end up going the trailer route, do yourself a favor. Get a lockable aluminum storage box and mount it to the trailer tongue. This will give you a place to store a jack, lug wrench, fluids, tools, straps, etc. I picked up one from Tractor Supply and it works fantastic.
If pictures would help, send me a contact number in a PM and I'll snap a few in the next couple days.