This is an autumn attraction. In 2017 the farm/corn maze was open September 22nd through November 12th. It is in between Tampa and Orlando (and is about a 45-minute drive from either direction). If you are a local or happen to be in town when it's open, you should go.
The corn maze is huge and full of pathways. We went in during the day and then again when it was completely dark. It was a blast. There are other corn maze farms in this area, but many charge you to get in and then charge you for everything you do. At Harvest Holler you pay $8 per child, $10 per adult at "the door" and then have unlimited access to the following: the corn maze; hay rides; "cow train" rides; slides; rope swings; tire swings; hay forts to climb; corn cribs (for kids to play in); a mini golf course set up around old farm equipment; cornhole (a bean bag toss game, for those who aren't from around here); horses, pigs, chickens, cows (and free food to feed the horses and cows). There is also a pumpkin patch (but, obviously, you would buy a pumpkin separately.) And they serve tasty and inexpensive food, such as corn on the cob, burgers, fries, etc.
Obviously this is a super family friendly environment, but I would totally go with an adult group as well. The corn maze alone was worth the cost of entry. And most of the activities are fun for adults (I did literally everything but roll around in the corn crib bathtubs with the kids, lol.).
The other thing to look out for when comparing corn maze farms is that some of them remain open even if the corn has not grown tall enough (a tall man should not be able to see over the top of a decent corn maze) or was completely wiped out (as was the case this year for many of them, due to the hurricane). The websites will tell you whether there is a corn maze at the moment, and there are pictures that show you how tall the maze actually is. And the websites also let you know what is included in the entry price and what is not.
We stayed five hours and only left when it closed, but next year we will go earlier and stay longer. We did several Halloween-related outings this year, but this was definitely my favorite.