if u didn't get seat in 3rd allotment,u can attend real time allotment....even if u didn't get in real time allotment,don't worry...once u register by attending real time allotment..u can check ur waiting list status online itself for further real time allotment,u don't need to come to campus...if u get seat, come to campus....
about ur returning date??? better call officials and ask them whether it is imp to attend in person....if its not imp then u don't need to come and u can sent ur relative/anyone ....