Go for comfy and practical. Some nice pyjama trousers and a t shirt. If it is likely to get cooler later on, bring a hoodie or comfy sweater to put on. Bring some cozy socks to walk around in, or go barefoot, whichever you prefer. Hope this helps.
undershirt and pjs
Wear printed pj pants or shorts and a baggy t-shirt or tank top.
wear black PJs, with a black or grey tank top!
get an animal print pajama set. have fun