Aisling kept a watch in case anything else started an attack. She kept her bow in hand. When she sent it back into shadow, the arrows would go, too, so she was unconcerned with collecting them. Yes it was a convenient and special magical weapon, but only one who could Shadow Dance could use it, and she was the only one the Queen had who could use it. That's why she also had her sword and daggers. They had been made for the First Shadow Dancer, of which she was the Third.
She wasn't exactly sure what was going on with the burial mounds and the rest of them... moving metal cot, unconscious small folk, humans, and whatever... at any rate.