In all my shooting I recall a vast majority of experience shooters take the oppisite approach to new shooters. They always jump right in to make you feel welcome, and to coach you along.
As a pretty new highpower shooter I can attest to this. If you don't have all the stuff you need people will loan you equipment. The experienced shooters love to help new shooters.
Experienced shooters understand that they were new once too and that without new shooters the sport will die.
If you show up with a rifle and ammunition you can shoot and no one will gie you any grief.