Right, so I found a few (non-empty) Bigger bags piled together, earlier in the day today while bouncing around in Uralia. Posting here as advised by a guide, as I am not sure what to do with them.
If anyone has lost/misplaced (Or got booted out of game while sorting these bags), please IM me in game or post here; please describe number of bags and contents, and where you left them, and I will hand them over to you.
ETA: just thought I'd add that it is my sister, CottonCandy Angel who spotted the bags first when we were playing together in Ilmenskie. She handed them over to me when she saw they were not empty and she too is watching this thread. I thought I'd give up the search and distribute the contents randomly to newbies after a couple of days, but she wants to hang on to them till the thread closes. We're both still discussing about what to do with it all. So a lot of the credit belongs to her too really :)
ETA/Update: Much relieved. The mystery of the bags have been solved with the help of some awesome staff (aka Araldia!) Please refer to her post below for clarifications. Everything has been sorted and issue resolved.
Thanks to everyone who has posted here with ideas and encouragement! Hugs and happy Zilloween!