Call NEA to check for tide timings. You can only go on the broadwalk if there is no "official" guide with you. You neeed to contact NEA for a guide to bring you onto the sand as you need to know where NOT to step on as there are living creatures there.
Was there only 2 weekends ago. Changed a lot since I visited it 20 years back.
Either walk 1 hour there with mossies as buddies or take the mini bus @$2 per person to Chek Jawa.