For Olivia we decided on just having her wear Cohen's old tiger costume since it'd keep her warm and cozy at the ward trunk or treat.
The trunk or treat was on Halloween which was great since that was all we were going to do. Cohen was shy but did a good job saying "trick or treat". There was one car that had creepy decorations and Cohen refused to go to it but other than him getting scared by the one car he loved it.
Olivia was a good little buddy going to all the cars with us but was glad to go home and go to bed when it was done.
Overall it was a success and we still have candy from their goody bags waiting to be snatched.