You can still leave those things for dream tourists Of course it won't be as spectacular with no fireworks in the sky, but these little gifts are still fun for dreamers.
So should my Dream Town, and I've buried a couple of fountain fireworks, sparklers and roman candles for guests... hopefully the firework show is on!
Oh, and thats a tip for you, bury fountain fireworks so they won't go off and guest can enjoy them, I have a trail of sparkles and such leading to the dig spot which has a silver shovel in the middle so hopefully people would take the hint!
EDIT: I've just visited Hanamura, Tina's Town, and there was no fireworks...
Another option to be able to use the fountain fireworks is to buy some wrapping paper and place them as presents. But then the problem with this is that it may lower your town status.