First post, first TT, first of many stupid questions.

I agree with the others about tire pressure, but you stated that it started after being cut off, I was looking at the exact trailer for us and would have towed it with an f150 I'm wondering if your trailer brakes were not set properly as that would have caused the trailer to push the tow vech. all over the road until you let off the brakes and gave just a bit off throttle to pull it out straight. and they comments about your hitch and sway control not being enough is true. i got 1200# bars and dual cams for our north trail 26rlss.

I didn't see what brake controller you are using? A proportional controller like the Prodigy will make a WORLD of difference when braking.

First thing I did when reading your post was look at your location. I am in PA, you are quite a distance from here.

The things you describe are very common issues for the inexperienced towing person. Not to worry, though. An experienced person can look at your setup and in about 10 minutes suggest changes to pretty much eliminate the troubles you had.

What brand and model tire do you have on your TV? What is the max inflation on them, and what are you running in them?

Huge discussions all the time about using the max pressure on the tire vs the vehicle's door frame. The vehicle doesn't have any way of knowing what the construction or brand or style of tire you are running, so it cannot possibly be the final say on inflation ;)

Another hint: If your tires have "P" in the numbers, they aren't going to be good for towing near the top end of its capacity. Another easy fix ;)

Do you know anyone locally who has had a camper for a while? They probably have some good input ;)

If the picture of the trailer you posted a few posts above is your trailer attached to your truck, it looks like the trailer is a little nose high. That, in itself, can cause sway. I think someone already suggested it, but before you do anything drastic, get the WD hitch manual and set up the hitch yourself. See if that helps your problem. You have enough tongue weight with that trailer. My only other concern would be (and I already mentioned it) is that the WD hitch they sold you is probably too light for that trailer. The tanks and storage area are in front of the axle. That model is, by nature, tongue heavy.

We had some sway issues with our 27' TT with a F150 TV. Weight distribution was setup correctly by me. The dealer did not have it setup correctly. We had friction anti-sway bars and we replaced the hitch setup with a Reese dual cam. Loved it. We eventually upgraded to an F250 with more bells and whistles (backup camera). It is a totally different experience pulling now. I feel like now that I am pulling the TT instead of the TT pushing me.

JMGNole wrote:

The tires are the prescribed tires, properly inflated, and brand new that morning.

The trailer was empty, except for the furnishings and water.

The extreme sway event was caused by us being undercut in traffic.

I'm not surprised and can be very typical handling issues on brand new tires. Tread roll till the tires are broke in can be common.
I've seen 3/4 and one ton truck owners with 5th wheel trailers complain about TAIL WAGGIN' THE DOG issues with brand new tires on the truck.
New tires can take several hundred or several thousand miles to break in. And many times this issue can be felt when not pulling a trailer. I'm sure other factors are working here but at some point the combo can be fine tuned to eliminate those type events.

GM was notorious for using 6.5" wide wheels on 1/2 and even 3/4 ton trucks. Then add a tire like a 265/70-17 that can have a 8"-8.5" wide tread. This balloons the tires tread causing it to ride the center of the tread especially at higher pressures. Same type handling when towing a trailer.

profdant139 wrote:
Just for a moment, take a step back -- here is a glimpse of the future -- you will eventually work out your towing issues. You are going to have more fun with this trailer than you ever thought possible. Your current difficulties will seem pretty minor in the rear view mirror.

Hang in there -- it's all going to work out!

I would like to second this sentiment. It may seem very daunting now, especially after all of us rainmakers, but it's very doable. :)

The trailer is in another county.
HOA restrictions. This probably won't help either.

JMGNole wrote:
Some asked me to post a pic of the hitch.

I could be wrong looking at the pic ,but the chains should be crossed in an "X" pattern.

sorry maybe I wasn't clear enough. Although your picture helps, what I was suggesting is post a picture of your whole "wagon train" (ie. trailer and tow vehicle) on level ground. This will give people some idea of how you setup things. Your picture does help a bit as it give a close up of the hitch ... but also important is the "final result" and impact on the overall "wagon train" for things like sag, hump, etc. My guess based on your info is that the bars are a little light for your trailer most likely resulting in sag of the overall tow vehicle.

Some asked me to post a pic of the hitch.