I am 4-6 lakes to hops from. 4miles (home lake) 25min 20miles, 45min, hour 20, and 2.5. Last 2 are freeway. I will run 70, not worried. I run 65-70 with the camper, the boat is smaller and ride perfect no walking. I also keep a watchful eye out at all times. Sometime this season or next winter a set of trailer brakes on the boat will be installed simply for stoping distance reduction.
Slight side tangent. About freeway accidents when towing. 2 years ago around 9pm in summer so just dusk. I had before our camping trip (800 round trip) had the tires balanced and rotated. Well on the return about 2.5hr away from home towing my 16' hard side popup camper the drivers rear wheel of the Tahoe got a vibration then boom the wheel and tire snapped off the Tahoe. I was doing 70 area outside of Atlanta GA. Yep they over torques and stripped a couple of the lug nuts and 2 snapped of and the remainder stripped the nuts off. I was now on the brake rotor at 70 area towing a 3,500# load on the freeway tailwhiping sideways across 3 lanes. Good thing there was noone next to me. Knowing defensive driving and growing up kart racing I knew the last thing to do was hit the brakes or I would instantly be spun or flip. Just let her slow on her own and regained the control. Similar to driving on ice or hydro planing or in the mud. About 3 or so tail whips I was straight and in the E lane coasting to a stop. Wife though all we did was blow a tire. None the less I said a prayer once in park. Moral it's not always the collision you have to watch for its anything. And having enrages helped me stabilize the camper.
I now have them hand tighten the lugs and back it off the lift and I personally use my torque wrench and tighten all the lugs.
This is the amount of rotor I wore off. No body damage. Camper ok. Me and wife ok. Don't panic!!

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Not Penny's Boat
1993 190 Horizon 5.0L EFI http://www.smwebhead.com/phpBB3/viewtopic.php?f=3&t=111361977 14' CMF Skiff SOLD
2015 Emotion Stealth Angler 11