hi cynthia,
frm shifu and other pple i consulted, parents are not to meet each other. therefore representatives are required. if you're not sure, ask both parents 1st.
inlaws rep will bring the things to meet my parents. since we're not going to stay with the inlaws, we showed the rep the bathtub items and arranged to bring to our new house ourselves after GDL session.
usually the rep is older folk (eg aunties), so in my own opinion, why trouble them to bring these heavy bulky stuff for you?? bring urself lah!
the significance of these things is considered ur wedding dowry given by ur mum...you can choose to bring the stuff to ur place anytime between ur GDL and actual day, cos you'll need to display/light up the bed lamps.
i chose to bring the things to the new house in the afternoon/evening since my GDL was in the morning, is bcos i had gone to pick a good date for GDL. if you're not pantang, you can bring it over anytime at ur convenience.
hope my explanation is detailed enough.
cheers!