A low simple ponytail should be fine... I honestly don't see the concern... I would hope people are too busy mourning to notice someone's ponytail. Just sayin'.

2c or something MODCG Since December 2011!
New May 20th Routine
Low-poo:SheaM
Co-wash:VO5 KiwiLime or VanillaMint
LI:TN, Regis OliveOil Condish, GVP CB
Styler: LALSG
Daily routine: Cleanse, LI, soak with water, scrunch in gel, plop, pixie diffuse, air dry.