I'd hate to break it to you, but frequently schools will not accept ANYONE off their waitlist.
You might think it's cool to put off applying to med school and have a lazy summer, but like everyone else was saying, give yourself every advantage that you can. If you submit at the end of August, plan on 1-2 weeks for AMCAS to verify your information, 2-4 weeks for schools to process your information and send you secondaries, 2 weeks to complete and submit secondaries, 1-4 weeks for schools to act on submitted secondaries, then 2-6 weeks until you can interview on the next open interview date.
Best case that's 2 months before you can even interview, but more like November and December. On the other hand, some of your peers who submitted in June and early July will have acceptances in mid-late October.
Spending your last year of college having already been accepted to medical school is A LOT more fun than waiting until your summer off to learn your fate.