We virtually always drive with empty black and gray tanks and always a half tank of water. Occasionally we put a little water in our black tank for the "slosh cleaning effect".
'scale' trailer weight
is 2400 lbs. We try to scale weight
every year and it's always right around 2400 lbs.
Our 200-215 lb tongue weight is on the light
side compared to the traditional North American rule of thumb, though normal for Europeans. I know this is a concern for some. We have towed for a long time and many miles with our fiberglass trailers and have never felt any apparent "trailer lightness".
We do have an anti-sway bar, We purchased it for emergency situations and it has responded well in the two we've had. We towed the Casita
16 for a year without an anti-sway bar with no issues as well we initially towed our Scamp
16 without an anti-sway bar again with no problems.
In my opinion there's more to the sway issue than trailer and tongue weight. I believe weight distribution is very important. We attempt to keep our weight as close to the axle
as possible. Clothes are at the ends of the trailer, canned goods, pots and pans, appliances are all near the axle.
We carry no heavy coolers inside our trailer and no real weight on our trailer's bumper. Our front hitch has only one battery
and one propane
Secondarily, anything heavy we carry in our tow vehicle is located between the tow vehicle's axles, like our Volcano Grill, and case of water. Lighter things go in the back of the tow vehicle like our aluminum chairs.
We do three other things to stiffen our setup.
We have drilled an additional hole in our ball mount to allow us to slide the ball mount 2-3" closer to the Honda's rear axle. This reduces the effect of tongue weight on the front axle. Think of it as trying to become a fifth wheel.
We tow with our tow vehicle tires
at elevated pressures compared to normal ratings, (39 lbs versus the normal 26). This stiffens the rear tires
reducing the tendency for the tow vehicle to roll onto it's rear tires
side walls due to side forces. We also increase our front tires to 34 lbs.
We also use a hitch immobilizer that prevents the ball support from moving in the hitch receiver.
We do not drive with our anti-sway bar really tight, we want the sway bar to be able to slide and act as a brake, not something that locks the trailer in to a hard straight line connection. We never have had to release the sway bar to back up.
On top of this we try to be careful drivers and look ahead and behind to minimize rapid lane changes and motions. We avoid severe wind conditions, of course this is not always possible but we don't seek them. We never drive in snow or ice though we have found ourselves in the middle of a snow squall. We avoid wicked rain but again you can get caught in it.
Simply we seek the safest circumstances attempting to minimize situations that can harm us, others or our beloved Scamp
. (I was surprised how sad we became when our Scamp had a frame problem a couple of weeks ago.)
I am not saying that there's anything wrong with 15% tongue weight, big tow vehicles, heavy coolers in trailers or ....... rather just describing what we do and works for us.