Other than generally knowing where your turkey flocks are in the areas you can hunt, there is really no need to spend an inordinate amount of time scouting in the winter. The key to hunting spring gobblers is knowing how to find them immediately prior to the spring season.
It's all about knowing how to use locator calls to find out exactly where they are roosting during the spring. Learn how to properly use locator calls prior to, and during, the spring season, and you will never have a problem finding birds to hunt. (Note: we have discussed locator use in many past threads on OG)
This is especially true in the big, wide-open areas of the western states where turkey flocks might be miles apart. You have to find those birds before you start hunting them.