On a college campus, a week of coordinated events works much better than spreading the events out, because students are so busy they need to be bombarded with Information. People are usually more aware that the event is happening if it's over a week, and you have multiple opportunities to spread your message at maximum exposure.
School papers love weeks too.
The downside is that getting consistent attendance is a challenge. If you plan well, every event can be decent. Setting up a table to write postcards to congress can be a powerful component of your week that gets the word out and creates political momentum. A week needs at least one strong speaker. Try for someone who is well known as well as an expert.