I've used golf balls on top and they work for mice and help with rain. I like parkers pvc too. I use a marshmellow on or under the trigger

I normally use Berkshire anchors but have also adapted some of 76's cable loops because there are some places Berkshire's will not go in the ground. Just make sure to use a big enough tree, coon will chew trees and climb them. Don't forget drags will work too.