We have no way of knowing how bad your stock springs are sagging. You can find out by going to the FAQ stock specifications and measuring the height of you rocker panels then subtracting the additional height of the 30" tires you are using and comparing that to stock rocker height which I believe is 18"
Here is a chart that can help determine what is possible. Keep in mind stuffing the fenders with oversize rubber without lift will cause the tires to rub on anything except a JC Penney parking lot. Which is ok if that's all you plan on doing.
I don't dig the overstuffed wheelwell look, all show and no go.