I'm no expert ... but if you feel things in your past were too long ago enough to mention then DON'T ... and this is exactly how I would explain it ONLY if asked about it. You pretty much answered your own question with this... These were events that took place several years ago, and do not reflect on your current lifestyle - this in itself is not a lie or stretching the truth and can save your interview if challenged for an explanation.

As for gear usage, Hell to the NO ... they don't "need" to know nor would they understand - mentioning this would likely prevent you from getting the job for several reasons ... liability, legal, etc.

Baby1 also brought up another good and all to real scenario ... your physical size can be very intimidating to others during the interview process - probably not so much in this case - but I have had it happen a few times in the past with the typical 'god your huge' remarks, or 'do you bench press buses?' - during the interviews! . Best to always try to conceal your size to avoid any extra attention in that area.

Keep us posted, I really would like to know how it turns out for you and hope our posts help... Thanks for sharing with everyone and Good luck!