If you're the kind of camper who spends several days or more in one spot, tilting makes sense. I mounted the panel on our first FWC with a piano hinge on the factory rack, but since we meander, staying in one spot for a day or two and then a short trip to another spot, we tilted the panel maybe 3 or 4 times over the 10 years we had the Eagle.
What I do recommend, if you can, is to tilt the panel sideways (high side on either the drivers or passengers side). That way you need only one support to lift the high end (assuming a rectangular panel). With the piano hinge on one end, It was sufficient to use tie downs on the lift end (with rubber pads at the contact points) while traveling.