I am considering putting a trailer hitch on my Lexus 350. I need it to easily cart two bikes during the warm months to some out of town rides. During the cold months I don't need it because I can fit one bike in the back of the vehicle and won't be doing any out of town biking. Is it easy to put a hitch on and take it off? I do quite a bit of driving for work and don't want the extra weight.