I am new here. But my advice ( because i am old, and know a little from experiance ) is this:
1, just ring your local police station, if you want to be clear, and tell them where you are going, and when, etc. There really ISN'T a need to do this, but i can't hurt.
2, make damn sure your pellets are nowhere near your weapon.
3, make sure your weapon is in a bag, if you have one., or otherwise wrap it up in several blankets. In fact, even if you have a sack, and you are going to be walking the streets, wrap the sack in a blanket too; ie, try to make it NOT look like a weapon to a passing memb