To answer your question, I plan on trying to cache all 31 days in August.
But I've seen similar concern in other posts about these aaugust souvenirs. The idea I've been wanting to share with Geocaching.com is the ability to sort or catagorize one's souvenirs to their own choosing. That way a person could keep their favorites or their prized ones on top, and others in a sub folder (or some other organized fashion). That way, the people that like collecting all/any souvenir can go for it. And for those who only want to collect country souvenirs (or whatever) can do so without feeling "cluttered".