Hi orinskye - I understand the business of school and work! I graduated from college in December of 2003 and worked at the Census Bureau while I went to school. I didn't have Hercules at the time though, so I can imagine it's even harder for you with Toby.
We leave Hercules alone during the day because my boyfriend and I work. I know you've mastered the crate training with Toby from other posts, so rest assured that he is in a good place while you are away. I constantly think about Hercules while I'm at work, I guess that's why I'm always on yorkie talk, getting the yorkie fix when I'm away from him. I have pictures of him all around my desk, on my computer's background, etc. That's the best way for me to cope with not being able to see him. So bring along some of your favorite pics of Toby and just remember that you have that adorable face to come home too..... and your fiance too!