I have a new bh 3010RE and am in the process of buying a lot & having a home built. The problem is the rv parking is going to be up a slight incline on the driveway then leveling out after 20'. Also, at the same time the 5er will not be in a straight line with my gmc long bed. It will be at an angle when in place. Can I unhook at an angle? Then will I be able to re hook?