I'm heading in on Wednesday for an alignment on my 2004 E450 chassis (29 foot with no slides). I don't currently have any handling complaints, but it pulls to the right so I'm going to have it checked out before a big trip next week.
I'm not optimistic about getting them to set it to 5 degrees caster, but will ask. I had a difficult time finding someone local that would even do an alignment on a motorhome, no one seems to want to touch it. The shop doing the work does fleet maintenance for larger trucks, I'm hopeful they will know what they are doing. We'll see...