True I have done enough from pre can days to post can and always fit Towbars to larger car as me and the late wife caravanned a couple of time a year, trickiest part is fitting duel electrics you need a canbus bypass relay which does the bleeping and a split charge relay for the Fridge/caravan battery, if fitting both, the car battery connection must be heavy enough to power both and will need to be run from the car battery to the back of your vehicle and I found a power probe that nicks the wire and a test lamp to pick up trigger connections for the rear light/fogs/indicators/brake lights, Haynes Book woeful when it come to wire tracing half the wires are wrong colour codes or dont show individual circuits clearly so probing better. If you dont fancy Caravanning get a roof tent I have one from Ventura, which is under £800 for the basic model and under a grand for the extended model with an added awning that zips under the unfolded floor the Touran is the right Hight and if I get my Carens running that is slightly taller, I even tried it on my Fiat Panda but at 5' 7" i NEED TO STOOP slightly to walk under that and the zip awning is low and sags.
All in all if you dont know what you are doing leave it to an experienced fitter But Towbars are generally easy to fit just assembly loose then torque up when assembled, wiring much trickier!