Sure, i also cant wait to break away from the city at a million miles per kilometer too.
BUT, for the safety of myself and my family in the car with me ( not including the other road users) i prefer to keep things steady at 100 or 120 if i feel that it is safe to do so.
being that i reside in the western cape, the N2 and the N1 has pretty good tarred roads. which i am very familiar with. so i dont mind opening the taps to full at 120 kmph,
however if ever i feel that i am driving on unfamilar roads i generally keep it between 80-100. depending on the road conditions obviously. if you dont know the roads, you wont know whats coming.
i might just add that i have an onroad caravan, NOT an offroad one. so i take extra special care when towing.
the only advice i can give you John, is that safe towing is the ability to predict all the bad things that could possibly happen.
Has your caravan ever fish tailed before?
Have you ever experienced a blow out at 100 Kmph?
Have you ever driven over a pot-hole at 80kmph?
Have you ever tested how long it takes to brake with your caravan fully loaded at 140 Kmph?
Lastly, did you know, your caravan insurer wont pay out if they discover you exceeding 100! or 120 ( outsurance is 100 and cara-sure is 120 if i recall)
Then ask yourself what is the value of each life in your car?
Because any of the potential hazards i have explained above could occur at ant time while towing a caravan.
so ask yourself – at what speed would you prefer to face these deadly obstacles which i have explained above.
Remember, its not a holiday until you arrive safely.