For those mentioning larger brakes are better in 25 series trucks......as mentioned maybe in this thread and others for sure, brakes on the truck stop the truck. Brakes on the trailer, stop the trailer. If you lose one of them, you will be stopping in a longer distance! Most of us do not have RV trailers that meet any states limits on being light enough to not have brakes on the trailer. Unless you are talking a pop up. And even then, depending upon the TV, I would recomend brakes on one of them. If over the tv's gvw by 500-1000 lbs or so, then get brakes on the trailer, no matter the size of trailer. I did this on a single axle trailer that weighed 2000 lbs. Amazing how much longer the 1ton duallies brakes lasted, and for that matter, how much quicker it stopped!
Payload is the what you have to worry about when pulling trailers, you either have enough, or you do not! Power is not an issue with todays TV's vs 30 yr ago.
Marty