Choices, Choices

Ok.....so this is something I need to decide.

I have a professor who I want to work with for graduate school. I don't plan on going to graduate school until Fall 2014-- a year after I get my bachelors.

So, I have 3 choices.

One: Do Geology 410 spring of 2014 and graduate with my bachelors that June. (Daniel graduates around the same time). I would take a Diatom course this coming spring instead of doing 410 (spring 2013). Then go into graduate school Fall 2014. Classes in the meantime with be going towards my graduate requirements.
One Cons: geology 410 without my friends and the classmates I am use to.

Two: Graduate with my bachelors June 2013. Graduate school Fall 2014. (My current plan) Daniel still graduates Summer of 2014. Diatom course Spring 2015.
Things I am worried about: 
     -That I won't be able to keep up with my education in the meantime
     -That by that time the research I want to do will not be available for me


Three: I take Geology 410 this spring (spring of 2013) and not walk with my bachelors but I will have all the classes done for it. Instead, I will technically be done with my bachelors Spring 2013, but I will continue in school for Fall 2013 and maybe Winter 2014. That way I can take graduate level courses and get most of my coursework done for graduate school. I will take the diatom course Spring of 2014. By the time I start graduate school in Fall of 2014 I will have a lot of my graduate coursework done, diatom course will be done, I will have continued and not fallen behind in geology, and hopefully have a little baby by then. I will graduate from graduate school a year and a half later.

Plans one and three are very similar. The only difference is one I will have my bachelors a year sooner, but I won't have the diploma since I am continuing with school.

Any opinions?