My tilt bars are steel and heavier than required. I would have preferred they were aluminum. Amsolar has several lengths of struts to lift different width solar panels to reach a 45 degree angle. This is appropriate for Oregon as the 45th parallel passes through the state between Salem and Portland. The "ideal" angle is equal to the latitude where you are. You might want to make a set of two bars with one solid and the other with a slot down the middle. Put some markings on the slotted one and include a wing nut or T-nut mechanism such that you could vary the length to make the length appropriate for the latitude and time of year to match the angle to maximize the solar acquisition.
Looking around the web, you can find some ingenius solutions for solar panel tilting and steering with sensors, motors and processors to keep the panels at the best angle to maximize solar collection. Many of these look fragile if put on a vehicle and needing maintenance to keep everything in working order. In addition to the complexity, most of these would increase the height of the unit to eliminate storing your camper in a garage.
One of the most interesting I found was a ground mounting support here in Oregon where there were three freon or equivalent liquid filled tanks. The one nearest the sun evaporated the freon and forced the gas to the cooler tank on the other side. This was a passive steering mechanism. By moving the weight to the other tank, the panel mount would swing around keeping the panels pointed toward the sun. At night the ground was warmer than the air and another tank pivoted the panels back to the starting point in the east by morning. Each quarter, the owner changed the tilt manually to match the angle of the sun. It worked for the owner and gave him something to do after retiring from his career as a semiconductor engineer. He also had a smalll hydroelectric generator in the creek, a windmill, and a gas generator if all else failed. He had been living off grid for quite a few years of necessity as every windstorm took his power lines down.
This is something similar in concept but different. I wish I could remember more but it was more than 20 years ago when I visited his place.
https://www.motherea...er-zmaz77ndzgoe
Paul