Not sure what you mean by localized, as this area covers the better part of three states. The jamming signal emanates from one location so I doubt they can restrict the affected area to just restricted airspace.

What does a CD do if a NOTAM like this pops up on top of his/her contest? Move the launch time to 3pm? require cameras for turn points (kidding, but what's the alternative?) Hope for the best? If it hasn't happened already, it will. If a pilot gets a "hole" in his log and misses a turn point, is he/she just out of luck?