I towed 25k miles using a Gen 2 Raptor and a 24ft steel enclosed trailer with a weight distribution hitch and sumo springs then bags. We towed all over the PNW and did 7 trips down to CA - lots of mountain passes. When I moved to TX, we towed all over the area as well as did some trips to Road Atlanta and VIR.
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Regardless of what F150 you have - I wouldn't go over 24ft or a lighter 26ft trailer. It's not the power or brakes - it's the chassis. A big gust of wind or slippery conditions will push you around a good bit and it gets stressful. This is a 24ft - enough room to be reasonable and not stress the tow rig too much.
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These days I have a much bigger setup - and I'm not exaggerating when I say this is easier and less fatiguing. All due to the full ton dually and gooseneck (and triple axles). It's only more stressful parking and on small town roads (truck stops make fueling easier than the bumper pull).
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I don't share this to brag or say you need a bigger truck - but to give context into where my opinion comes from. With a 1/2 ton, please don't buy too much trailer unless you're willing to upgrade the truck fairly soon after. You'll just wear yourself out and not want to do long trips. 24ft AL ATC or InTech is the sweet spot.
@TMSBOSS is 100% right. Buy once, cry once. Get the right trailer first - they ain't getting any cheaper