My best, most caring experience has been on Irish crossings with Stena.
However, Britanny not so good. Despite telling them all along the way about ground clearance, half the time, the penny doesn’t seem to drop!
Peter is right in that you need to go on the level with the lorries, but much depends on how many lorries they have and whether loaders can be arsed to fit you in. My experience is that I get the best service by approaching one of the loaders whilst queuing well before loading starts. It’s the transition from ramp to level that causes the issue, so if you have to do it, approach at an angle. I have seen a MGB lose its exhaust on one occasion.
You may be better off with a 90s Morgan than with a noughties, for ground clearance anyway.
