According to the MTA service advisory page, there will no Queens bound F service to Roosevelt Island this weekend.
F 179 St-bound trains run on the V from 47-50 Sts to Queens Plaza, then express to Roosevelt Av
Weekend, 12:01 AM Sat to 5 AM Mon, Jun 6 – 8
… For service to Roosevelt Island and 21 St-Queensbridge, take the F to Roosevelt Av and transfer to a Coney-Island bound F.
For service from 57 St, Lexington Av-63 St, Roosevelt Island, and 21 St-Queensbridge, take a Coney Island-bound F to 47-50 Sts and transfer to a 179 St-Jamaica-bound F.
Plan accordingly for crowded Roosevelt Island bound Trams.