I generally try to hold around 62 mph. My MH will certainly run faster then that and if I find myself getting up there to far to often, I'll set the cruise control.
Of course I'll do faster if needed to pass someone. I love the RVs that go like mad passing you on the flats an then can't hold 50 mph on the hills.
No, I don't have a "Vehicle in Tow" sign on my toad. As close as it is to the rear of the MH, I hope people can figure it out. It doesn't really matter if they realize it or not as long as they stay a safe distance from it and all of the lights are working on it.
Bill