Yah, It's pretty much how comfortable you feel with it.
When I drove back to pick mine up, I hooked up and for the first 2-4 hours went slowly and kept looking in the rear view mirror to make sure it was still following me. The highway around there was pretty bad with almost a long wash-board surface from the big rigs,trucks etc.. so went under the limit and kept shouting, "Are you OK back there... heheh
By the time I was in ND or Wyoming? I was doing 85+ and told it to " Hang on, we'll get there...."
WA state has the law of anything towing a trailer of any size is stuck at 60mph.. like the trucks. I usually peg it at about 63-65 and seems to work OK unless I see the truckers slowing down, Radar?..
I beleive Cary told me that fuel efficiency is about at 63mph or so according to Craig... Dunno, never check mileage etc...
After the CICO loop, trip planning will be apx 400-500 max and done by5pm or so for trying to get somewhere. 2 day hard driving with 1 day stop... 8 hrs or so max... Used to be able to do a lot more, but can't, not worth it...
Hope that helps and the biggest lesson I learned from Jenn is that "McOffice (Mc Donalds) and KOA are good friends when lost... or straight driving through...
Todays trip to Moses Lake, I was planning on camping at a private campsite, Oasis RV Park and of course got a late start. Arrived at about 4:30, just starting to get dark and the site was a Dump... checked out another one real quick, but looked like a Member Only site.. so ended back over at Wanapum SP, closed, but the range said I could stay, so here I am... the point being, I was running outta sites and started thinking KOA... another 50 mi backwards...
And finally, I don't like setting up in the dark and plan my trips to arrive about 2-3 hrs before sunset... Makes life a little simpler...
Fun eh??