I think you have enough depth at RB to play matchups. You have 2 solid WRs two start weekly and a stone cold stud at TE. Even in an 8 team league having Graham gives you an advantage at the position. McCoy has the potential to be the #2 RB this year, however he and Charles will obviously be more valuable in a PPR system.
See how things play out with the top RBs. Having Hilton on the bench will give you the luxury of packaging a WR and a RB for a stud RB later if you need to do it.
14 Team 5 pts per 5 receptions
QB, 2RBs, 3WRs, TE, FLEX(WR/TE), K, DST
QB- Romo, Freeman, Manuel
RB- Sproles, J Bell, Bernard, W McGahee
WR - Megatron, D Bryant, V Brown, A Jeffery, R Randle, P Harvin(IR)
TE- J Graham, Sudfeld
DST - Dallas