Trust me, seven days of no bathing is the last thing you want to
worry about.
I went through ten days straight in my time - and eight of those
days were Cat 1. 
I won't lie - it won't be easy, but just do everything right and
have a positive mindset, and you'll be fine.
Besides, everyone will suffer along with you. Sure, you'll stink
like hell by the seventh day, but so will everyone else.