Me and my mate (3 15yr and a 17yr old)all four are planning to go out tagging, drinking and smoking pot in our town

nxt weekend.
We r gona take our mobiles, cans of spray paint drinks, and pot.
I was wondering what you take when u go out tagging when ur stoned/drunk and the best places to tag and to hide from cops in a largish coastal town???
Pros and cons as well.