Quick question, I recently bought a propride hitch and am planning on installing this week. Question i have is where my camper is parked, the drive slopes slightly from front of camper to the back. It is sitting level now so the front tongue is closer to the ground and the rear bumper of camper is higher. In reference to the measurement i need to take from the ground to the coupler, should i raise my tongue jack so the camper is evenly raised? Same height to the front corner as the rear corner? Doing this would take it from level to front being higher. Or do i leave it as is.. Couldn't find anything in install manual about this. I just want to get my measurements right so its set up right the first time.