i personally haven’t uploaded a dream address but i feel like a ladder and vaulting pole would be the most important tools to lay out depending on the layout/areas on your island. along with those, a wand, some goodies like the ones obtained from the firework shows and maybe even an outfit that would match the theme of your island would be nice to have out! i really liked when people left out outfits in new leaf, especially with wearing pyjamas whilst dreaming aha