Tow bars!
I've just got my Yeti - and I'm delighted with it. I did lots of research (or so I thought) and went for the tow bar preparation as a factory fitted option. I could have saved my money.
I'm very lucky to live near to Harrogate Towbars & Trailers in Starbeck. They have fitted me a fixed Swan Neck (Thule) tow bar and electrics, inc 13 pin plug, with relay to charge fridge in caravan etc for just under £380.
The tow bar prep is just a bit of pre-wiring and a removable flap in the rear bumper (okay if you go for a detachable). It doesn't cover the cost of the recoding you still need to have done for 1) the car to do all it's clever stuff whilst towing 2) the rear parking sensors bleeping when you select reverse whilst hitched on.
If anyone knows how to do the recoding you could save the day!