Keystone Passport Ultra Lite 238MLWE With a dry weight of 4000 lb.dry ( 5400 gross) 25.5 feet long, way too much
for a V-6 Highlander.
Salem Cruise Lite 201BHXL dry 4200 It is a shorter trailer, but by the time you add passengers, gear and "stuff" into the RV your maxing out the Highlander.
Salem's are cheap trailers....
How much do like the Highland?
I would be looking at a hybrid. Like a Aerolite 174E
3100 dry 18' long...Not a fan of Keystone's warranty department..Things that were clearly a "build Issue" that they would fight you tooth and nail to fix it....