I think that J Rogers has just about covered it all except one thing - blue sap stain.

Pines are quite susceptible to developing blue stain if cut and then not dried quickly enough to prevent the formation of blue stain.

You can deal with this one of two ways.

Submerge your logs in water till you are ready to cut them or

Pick your time of year to fell and cut.

The next three months are the coolest and driest of the year and thefore good for cutting and stacking. Felling and sawing later on in say June through August i.e. when it is warm and the relative humidity is high will run the risk of a slower surface dry and the development of blue stain.

Since your trees are only 30 years old then when you cut them you will probably see that almost half the growth rings are still sap wood and therefore you need to take higher than average care to avoid stain.
Ken Hume