ur skipping school does not impact your chances at SD as much as it does what kind of person you will become in the future
yes, bad attendance records will show, and the folks at SD might probably wonder how you managed to get good grades with such a bad attendance. but as SD is not an ivy league school that you need a 2400 to get into, you might/might not be accepted
but it is ultimately you, and the potential you can achieve, that defines who you are as a person. do not restrict yourself to just "SD for #1 school". be more open in your choices, and even try to reach for better schools, whether they be name-schools (harvard), colleges that offer a personality (liberal arts), or some other private. and try your best in high school and see where that takes you. If you don't end up going to your dream school, that's part of the process - but what ultimately matters is how much you are willing to try. if you insist on class being a joke and just ditch all day, and still get good grades, it implies that perhaps you are not being the fullest person you can be.
I personally was rejected from my dream schools, but only after I tried my best in high school and tried new things and experienced high school.
So I guess my answer to your question is that you shouldn't be concerned about getting into SD, but concerned more about other things (after all, it shouldnt be that hard to go to class and have ok attendance)