If you had the last pick in a 12 team PPR league and no WR have been drafted would you go stud WR,stud WR?

That's what I did.Got Fitzgerald and Andre Johnson.If it was a mistake I probably made it worse by picking Greg Jennings in the 4th.Obviously my RBs are weak.I still ended up with Ronnie Brown,Addia,Thomas Jones and Derrick Ward.I saw that Cadillac Williams is going to start in TB so I picked him up as a FA.Here's the team I ended up with.

Starters
QB Mcnabb
RB Brown
RB Addia
WR Fitzgerald
WR Johnson
TE Heath Miller
WR/TE Jennings

Bench
RB T. Jones
RB Derrick Ward
RB Cadillac
WR Lance Moore
WR Justin Gage
QB David Garrard

So did I make a mistake by not taking my first RB until the 36th pick?I think I'll be ok but just wanted another opinion.