Hi Colin.Although I have had two Volvo cars:- an 850 2.5litre 5cyl 10valve CD Auto Excellent Car & now my V70 20valve T5 CD Auto,awesome when woken up; like any other when let to tick along.I have not had the 9series but I believe they are an excellent tow car(especially the Turbo Diesel Model, there was also a 3ltr petrol version)but might need the rear stiffening a little( Grayson Inserts are very good) but inform your insurance as it is a modification.They are becoming very hard to find,don't let a good one go.I have recently seen One Owner/Full Volvo History cars with 120,000+ go('Sold-Gone')for over a £1500.00.The last year of manufacture was 1996, but there may be an odd very late registered one about; but currently on AutoTrader(National Search) there are 5 (960) Auto Estates. They are longer than the V70 by a fair margin and were very popular with trades people especially joiners.You could get an 8x4 sheet of board material in with ease(plenty of load area out of the caravan).