I'm going to DEFCON this year. Got the badge, plane tickets, and hotel all set; I also submitted a paper for presentation. I am going regardless of how much my arm hurts.
I'm going to list the calls for participation that are still open.. I meant to do this last week, but wasn't able to focus. I'm still not sharing my planned schedule now; they are adding Villages, Contests, and Parties every day, it seems.
IN-PERSON BADGES
Note- the online portion access is also sold at this link

Calls & Due Dates
1
Jun
Deadline: Call for Music & Soundtrack entries
6.1.21 (All Day)
1
Jun
Deadline: Vendor Application
6.1.21 (All Day)
15
Jun
Crypto & Privacy Village CFP open until June 15!
6.15.21 (All Day)
15
Jun
Aerospace Village CFP closes 6-15
6.15.21 (All Day)
25
Jun
Car Hacking Village CFP Closes
6.25.21 (All Day)
30
Jun
IoT Village CFP Closes June 30
6.30.21 (All Day)
9
Jul
BIC Village CFP Closes