I hoped to hide it as well. Some do manage to, but I very quickly realised I couldn't from those I know. If you go the wig route and and manage to keep working through chemo it's certainly possible.
My hair started to fall out on Day 13 (between the legs!) and on Day 14 the head hair started coming away.
Day 7 - 10 is when your immune system is at its lowest. This is when it's easiest to pick up a germ. If you get a fever of over 38° at anytime during chemo you have to go immediately to hospital otherwise you can get very seriously and dangerously ill very fast. Having said that, I didn't get ill once during chemo. K xox