The absolute, most essential advice for con-going that absolutely everyone should follow, because these are undisputed FACTS:
Take a shower before you go to the con.
Wear deodorant, too.
Its great that you want to get to a con early, get in line for whatever floats your boat and the like. Truly, it is.
You know what’s not so great?
Smelling to high heaven because you couldn’t be bothered to embrace the value of common sense hygiene before going to the con, and everybody around you now has to pay for that by wallowing in your funk.
Bypassing hygiene isn’t a time-saver, its selfish, as you’re showing that you clearly don’t care how others may perceive you and that your lack of self-grooming will offend others.
Don’t be a doofus. Shower and show that you care how others see you, that you don’t want to offend them and then go have fun at the con, as you smell fresh and clean, while showing the public around you that you do understand the benefits of indoor plumbing and taking pride in your public appearance.
BTW, “I’m cosplaying in a bulky outfit that will make me sweat and can hide any offensive odors.” is NOT an excuse to not bathe.
Take a shower and use deodorant like the rest of us. Your (and more importantly, other people’s) con experience will be all the better for it.