If you already have a TT then please do install sway control and know how to set it up. Practice using the trailer brakes. A friend of mine always uses the manual control for normal stops (he started towing when brake controllers were horrible). So, when a sway hit him one time he was already in position to stop it (trailer was loaded by his kids, he never did that again either
I won't own a TT. But, even a fiver can get sideways on ice or such.
Learn emergency driving procedures. Most of us let up on gas and hit the foot brakes in an emergency. Not a smart thing to do with low traction and trailers.
PS I don't think any of us set out to drive our RV's in snow and ice. But, we can get caught in it at times. Have had it happen a few times. Not fun but you can survive.