I've never been to any of them before leh. how do you keep out si
ginas? 
those si ginas need tour guide to bring them INTO sentosa... such
services are not provided in our outings hahahahaa
when i did it, i just put date, time: usual; venue: siloso
beach, usual pavillion... then IF they still come, just ignore them
and NOT intro them ard lah... SIMPLE!