Gday
If you are out prospecting/camping with others then you need to sit and have a discussion when you get there and formulate a plan in case one of you gets lost, because if the other people don't know what is going on or are newbies then you stand little chance that they might look for you or for that matter even know how critical it is to find someone quickly if they are lost, the first responders are the people who are with you on the ground so make a plan, keep in touch by radio, also if you can try to be aware of what direction they have moved in or tell each other which way you plan to go when you are leaving camp, , the police and searchers will take some time to mobilise and get on the ground and by that time it can too late as past events have proven, most importantly be responsible and protect yourself by making sure you always carry your water,radio,plb,gps, and with the camp or vehicle logged in to it.
Take it from me when things go wrong you will be glad that you bothered to carry all this gear, you may never need it and carry this stuff for years but when and if things go pear shaped for you it can make all the difference, there is nothing like first hand experience of getting lost and then luckily walking away from it to make you very aware how quickly things can deteriorate and the situation becoming a life threatening one.
cheers
stayyerAU