I regularaly tow boat trailers with my TDI 150 FR
Probably slightly heavier and longer than a caravan.
No
problem at all, it's a great towing car. Ok it hasn't got a 3.0 engine and 4WD but it tows well.
Got the tow bar fitted at Anglia Towbars in Newmarket, there's a limited choice of makes you can fit due to the LCR body kit (make sure to mention that it's LCR rear bumper when you book it in), they fitted a whitter one that looks cool and didn't need a cut in the bumper, much better than the swan neck ones that look a bit dorothy.
The main reason I swapped my LCR for the TDi was so that I could tow. LCR would probably only do about 3mpg with a big trailer on. I get 15-25mpg with the diesel when towing fully loaded trailer.