<p>I don’t think five options for summer camps is overkill. You want to be sure you go somewhere to hone and refine your skills this summer, and since many of your choices are competitive, there’s nothing wrong with having other choices in case one doesn’t work out. In fact, that’s a good idea! 
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<p>Interlochen is a little pricey, but they offer very good scholarships, both need-based and merit-based. I wouldn’t let that keep you from applying and then seeing what aid they give you if you get in. </p>
<p>In terms of renowned alumni, Interlochen boasts some fantastic singers: Jessye Norman, Ashley Putnam, and Lorraine Hunt Lieberson have all studied there. In terms of younger singers, too, Interlochen consistently turns out excellent musicians. They frequently do well in national competitions like the Classical Singer Comp, etc. </p>
<p>Definitely check with an administrator at Interlochen about arriving late. I don’t think it would cause a huge problem, as the first day is just a basic kind of orientation day with no classes, but it’s wise to ask and have a staff member’s approval.</p>