barcelona supporters catalan independence begin occupy poll station friday set possible confrontation police order clear sunday morning ensure referendum go ahead central government send thousands police reinforcements stop people vote attempt dismantle infrastructure need conduct referendum say illegal insist would go ahead catalan leader carles puigdemont tell reuters interview however everything prepare 2,000 vote point ballot box vote slip everything people need express opinion band play close rally referendum campaign barcelona people construct slogan referendum democracy big white letter stage front cheer crowd many drape red-and-yellow catalan flag people prepare camp poll station order defy court order close also high spirit one barcelona school hector 43-year-old local say five six families would spend night want make sure school open activities night might come clear us empty families sleep people street say add plan play ping-pong cook fideua seafood dish saturday head catalan regional police order officer evacuate close poll station a.m. sunday vote due open a.m. internal memo publish la vanguardia newspaper police chief say force use last resort time use force must take account might consequences police action avoid escalation situation especially children elderly vulnerable people amongst crowd document whose authenticity confirm police spokeswoman say far catalan police know mossos force hold affection region particularly islamist attack august show friendly face mossos come see see party say 45-year-old ferran taberner school daughter get complicate stay inside peacefully move us organizers say 60,000 people register participate mass school sleepover say show peaceful resistance even prevent vote believe anyone use violence want provoke violence tarnish irreproachable image catalan independence movement pacifist puigdemont say news conference regional officials display one white plastic ballot box bear crest regional government puigdemont say 6,000 keep secret place police confiscate thousands vote slip court fin threaten arrest regional officials catalonia high court order google goog.o delete smartphone application catalan government use spread information vote company spokeswoman say google remove content receive court order madrid claim authority constitution declare country indivisible remain implacably oppose vote also express hope sunday would peaceful insist referendum oct. government spokesman inigo mendez de vigo say add organizers would face criminal charge try hold sign large crowd expect streets sunday department store chain el corte ingles say would shut three store central barcelona central government say airspace city would partly restrict credit rat agency say expect catalonia wealthy region border france secede spain protract tensions madrid barcelona could negative impact country economic growth outlook catalans occupy vote station defy madrid 's order stop referendum