We don't, but I'm surrounded by a bunch of saw mills to take logs too, if need be.
Depends what your using the lumber for. If it's for rough work, go portable all the way.
For interior/exposed wood/true dimensional, best thing, if its available, is take them to a reputable saw mill with actual circular blades. They are so computerized, the dimensions are perfect within 100ths of an inch. Not these band-saw portable types. Problem with band-mills is tolerance is too large. If you go cutting a 20' true 10x10 beam with a few knots in it, the blade will jump and you won't be perfect. I guess I have been schooled to cut precisely/perfectly.