If you love strawberries, then a trip to Plant City is well worth it. As the previous poster mentioned, Parkesdale Farms has quite possibly the best strawberry shortcake you will ever eat. We made the short drive from Tampa to Plant City last weekend, just to eat their shortcake. If you like country music, the festival has a pretty good lineup of entertainers. There are also a lot of different craft areas that you can shop at within the festival grounds.
If you sole purpose for going to the festival is to eat strawberries, then I'd just go straight to Parkesdale Farms. However, if you like the amusement rides, music, and arts and crafts, then check out the festival as well! Enjoy!