Smoker didn't show up at Egghead as far as we know. Let him come to Beehive and probe himself whilst helping out the Hero of the Marines and his pupil.
As for Garp, he looked pretty great this chapter. Dude's passed his prime but still taking on everyone who'll come his way. I don't have him above the likes of Kaido or Shanks or anything in his old age but it's crazy impressive seeing him show off and not giving up despite things looking hopeless.