I have just what you mentioned.  3/4 T 6.75 bed and a 32 foot 5th wheel.  We use the B&W turnover system as we have a gooseneck ball in our pickup.  We did get the slider as I figured the extra cost would be made up the first time I got us in a tight spot.  We have absolutely no problems on the road, and have only need the slider 3 times this last summer.  It is a manual set up and I have now issues with that as you are already out of your rig looking things over when you decide to slide it (at least I am).  Easy to hook and unhook.