How do you post icons?

OK SO I would LOVE to join the Icon SS event (I'll be able to handle it I think xD), but I have never posted icons before in a world in that awesome way that u peoples do it!
I more or less know HOW you make the icons 'clickable', but would I need a photobucket/photo-account to post them online??
I've already signed up for a photobucket account, but I'm kinda weird in the way that I don't like my pics floating around on other sites :/
I'm thinking that if I absolutely need a photobucket account to post them icons, I might have to make a new account cuz my secret Plan B seems kinda sloppy :P

Any info at all on this subject would be very much appreciated!! Thankyou!