Depends on where you are, here in MA I saw a guy while I was in court who got caught with 22lbs in a large trash bag that got nothing but six month probation and random drug tests because in MA I believe under 50lbs is just possesion providing it is all in the same bag. If they caught you with 5 dime bags you would get posession without a doubt and probably some serious probation if your first time.
Don't quote me on the '50 lbs' but I know its around there, most I ever carried was a couple elbows.