I hate and love Graal the most from October to November to December. You need to have a buttload of money before Graal-o-ween because Eurocenter likes to take advantage of Halloween + Thanksgiving + Christmas by overpricing and releasing a bunch of stuff. You should have a bunch of spending money for Graal-o-ween and once that's over you need to start farming again so you'll have money for Thanksgiving. Once that's over you only have about a month before they start selling Christmas gifts and stocking up Onnet Store. If you really want to get a bunch of stuff before the overpriced items are released, make sure you start farming. September for me is farming + bug catching month because you're gonna need all the money you can get for these three events. Take advantage of the lack of updates and spend time stocking up on gralats for the holidays.
I really hope they don't bring back the trick-o-treating event for Graal-o-ween because it really was just a worse re skin of the Egg Hunting event. If they want to bring it back they should at least make the candy private spawned and not make some of the hats cost so much candy. I got tricked after looking for candy for about a week and losing about 100 candies.