I am currently in the market for my own RV, but first I need to add a towing package to my SUV. I drive a 2018 BMW X5 and I have been doing my own research, but I have a question. Which trailer hitch package would be the best? One that is pre-wired or one that I need to buy my own wiring kit? Anyone with experience with a BMW and towing a trailer have any advice? I am pretty good with wiring and working with my hands, so ease of installation isn't really an issue.