We came back from our first trip. It was an over all success. The only hiccup was we filled up the gray tank way quicker than we thought. We should use the campsite wash station more.
The other thing we learned is, as we expected, our tow vehicle is marginal for our 17B. We have a 2018 Mazda CX-9base model FWD. Used a scan gauge to monitor the TV. Without the trailer, the transmission temperature stays between 200-210 F. We live at 3000ft elevation, so the car probably has to run a little harder. With the trailer, transmission temperature stayed around 210 F in flat highway and generally used one gear lower than without towing. When going up a slight uphill for several miles at 65MPH it went up to 230F. We weighted the whole setup on our way back. With a half tank of gas, full water heater, empty fresh water tank, gears for a weekend trip, Anderson WDH and three adults, we were right around the 8000lb GCWR limit with front axle 2400lb, rear axle 2640lb, trailer 2940lb. The drive actually was quite stable. Did not feel like we are at the towing limit. The transmission temperature could be improved with a cooler, but we feel we need some margin in the towing rating, especially when we go to higher elevations. Probably will change our TV early next year before our summer trips.