That's spooky, because I have the same orange 550 with a very similar (or the same ) rack, and I twice made cross country treks on it of about 5000 miles each. The first was in '74 and the second was in '94. From both trips I have pictures eerily similar to your, stuff piled ridiculously high on the racks. The similarity is amazing to me. Nice to see a bike of this vintage ('74?) can stiil handle the long haul.
I do envy your windscreen, however. I never had one. Swallowed most every bug from Santa Monica to the Hudson River ....lol.