Can I wear a diy green witch Halloween costume to go trick or treating with kids to get some free candy about October 31st,around the neighborhood,and can I use a plastic bag for Halloween candy of trick or treating.

Yep ..you sure can ..

Yes of course

The best information probably would come from the website but the manager on duty at the exact store you are planning your outing. That is so you can get the hours and exact dates of their functions. So y'all can really enjoy your time there and no have to rush or feel stressed. It is an awesome feeling when the parents just can really enjoy the kids laughter. Have fun , I do hope this helps.