Welcome, Rob and Lizzie.

On the drive home from wherever you collected your van, it will have been unladen and the nose weight was probably completely wrong.

I remember our Triton bouncing about all over the place when I picked it up from AL and never having towed before I found it quite alarming. When everything was correctly loaded with the stabiliser and tow ball cleaned however, things were much smoother and I took it down to the South of France without a problem a few weeks later.

I'd suggest a 'shakedown' trip not too far from home to get used to everything before heading off into the far distance.

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