I tow my jeep with my frontier fairly regularly.
I have a 18 foot light duty 6k car hauler, weighs about 1600 lbs empty and my jeep weighs 3600 lbs. 5200 lbs together. So that’s about the same as what you’ll be doing.
You absolutely want trailer brakes because the stopping distance is much better with them. I have them on all four wheels with a proportional brake controller and it works pretty good. The brakes on the truck are the limitation really, I just replaced my rears so I’ll have to see if it’s improved
When I bought my trailer I thought I’d need a weight distribution hitch but the salesman said not to bother because the sway won’t be that bad on an open trailer. It would be nice to have but I don’t think it’s totally necessary, on the road it really isnt that bad.
As far as towing power goes, I have the 6 speed manual and I find myself just one gear lower than normal on most hills. I can’t complain, it has enough to get up even the most serious hills in vermont.
Overall I’m impressed how well this little truck pulls. I try to go slow and give it the space it needs, it hasn’t let me down yet.