Fell low on the stump delimb and buck to length, no limbs or any wood above the crotch should be cut for lumber it's full of stress. Your butt logs will make the best lumber, logs with big branches cut up for firewood. Endseal the logs with ancorseal, load on a trailer and take to a honest sawmiller. Smaller logs under 20" DIB (Diameter Inside Bark) on the small end should be flat sawn, logs over 20" DIB go ahead and pay the extra saw charge for quarter sawn. Logs under 12" DIB small end cut up for firewood or turning stock, you loose approx 4 inches (2 inches a side) flat sawing so out of a 12" DIB log your looking at around a 8 x 8 cant. Which will be pith ridden in the center, if you cut that into 1x8's your really looking at about 5 or 6 boards since two or three will be ridden with pith depending on the amount of crook and ain't no good for nothing but the fire place. Most sawyers charge extra for anything under 12" DIB. Get your logs to the sawmill ASAP for the highest yeild, sawing dry logs creates a lot of drying defect that will show up as checks when it dries.
If you have any more questions feel free to ask, we got some good sawyers on this site that I'm sure would be more than happy to answer any questions you may have.