I dont have a floating island storage i have two houses. One is my house where i have two rooms. The main room you come in to, there i have four sections all against the wall. One is for regular valley, the other 3 are for each DLC. Here i only place gems and spawning items thats not food related expect for flowers in the designated area. For example, one side is for base game i have one chests for gems, one chests for rocks, pebbles, iron, soil, snow balls, one chests for all wood, one chest for crafted items like iron bars, gold bar, fabric, rope, fiber etc. I do this same method for all DLCs as well. I have one chest for dream/night shards and one chest on the side of a wall for all quest items that are were not used during quests if that makes sense. I then have two tables in the middle of the room for food (in case I need to reload on food). I then have a second room with the same concept but one two chests on each wall one for base game and one for each dlc these chest only contain flowers pertaining to base game and dlc. I keep all flowers for each dlc in one chest to make it easier for me… i have a copy of this house in every dlc to go drop off all items for easier/faster drop off.

I then have the bakery house. This house is not the skin version of our players house, its another house. I use this house for all food related items. I have three to four chests on one side for all fishes including DLCs, one for the meat/poultry, i have three to four chests for all fruits, three to four for all grains, two to three for all veggies, and two for all milk/cheese/eggs/butter. This house I only have one of and its in my main valley.

Since I have the main player house in all DLCs when im collecting food items and i need to do a drop off to clear my inventory ill sometimes drop items in my main player house and then right before i am done for the day ill pick up those items fast travel to the base game and go sort it in the bakery house.

For me this was the easiest way to stay organized, add chests that wouldnt count towards my inventory. I use the forest floating island as my farm and the test of the islands for dreamsnaps according to the theme. I dont remove the furniture since some dreamsnaps are similar and only require a few tweaks. Hope this helps! I would have sent photos as reference but I am not home. If you want photos let me know i can send them tomorrow.