I think the farmers market will still be going on when Kumoricon starts, theres one thats like right next to the park/on the other side of the park from the Hilton, they have alot of vendors, fruits and food stalls. If thats not your suit theres the places around the park, I remember a think it was chinese resturant, called tiger garden, don't know if its stil there or the prices are good. Haven't been there in years, I live in Vancouver, and like most people said, you just gotta walk a ways, theres a delicious local Ice cream shop several blocks up on mainstreet called Ice cream renaissance(ICR) and a soda shop right by it called pop culture. Both really good places to cool down and take some time to rest and sit down. I live in Vancouver like 5 minutes away from the location, so I know some places, and if you have questions feel free to ask~