Americover is the annual show and convention of the American First Day Cover Society, and its celebration of FDC collecting. It is an APS World Series of Philately show that tours the country to different cities each year.
The 2018 edition is in Peachtree Corners, GA, just outside Atlanta. There will be 20+ dealers, 20+ cachetmakers, exhibits, meetings, seminars, the announcement of the best cachets of 2017, food events and more. There is a special Americover rate of $99 (including breakfast) at the Hilton Northeast Atlanta. (This is the same great hotel used by Southeast Stamp Expo each January.)
You'll find more information on the AFDCS website. Add "/show" after the main URL to go directly to Americover 2018 info.