Lots of misinformation here:
"If you're going to purchase a travel trailer, make sure it's not aluminum sided. They all have leaking problems at one time or another--usually in the corners. "
This statement is absurd and flat out wrong. There are lots of very well built aluminum sided trailers and fiberglass has its own set of demons.
"Secondly, while dry weight is not indicative of real world application, if used properly, you can use it to help."
Said before and will say it again....
Dry weights, all dry weights, are at best a joke and often a dangerous joke. No one tows an empty trailer. Run {Forrest run!}, from anyone who gives you a dry weight, only salesmen trying to sell you to much trailer will ever quote them.
Your truck may have a theoretical towing capacity of 7,180# but that is about as accurate in the real world as your trailers dry weights. You will run out of payload and thus be well over your trucks GVWR and probably gross axel weights long before you even get close to 7,180#.
I had a very capable F-150 SCAB that was rated to tow 8,600# and it was nearly maxed out towing a 5,000# 22' TT. Not trying to burst bubbles here but towing too much trailer with too little truck is never a good idea.
As always.... Opinions and YMMV.
:C