Welcome to EH-Net and thanks for the compliment on the site.
All certs can be attained through self-study (unless of course they don't offer that option). Some people prefer self-study while others don't. People are just different. If you put your mind to it and are disciplined, then without a doubt, it can be done.
Sometimes it's hard to focus with work, kids, distractions of every day life and flat out procrastination. A boot camp helps you focus and has the exam(s) scheduled, so you can't change it. With self-study, one is always tempted to put it off until you know the material a little better. First of all, you may never know the material better and sh!t happens that may force you to quit your studies. A lot never get back to it.
As with most things in life, it's up to you.
Hope this helps,
CISSP, MCSE, CSTA, Security+ SME