Eating dinner before the HEA party will probably help you to enjoy that party more than we did. It's the only party of the three where I would suggest eating at least a light meal before attending. The only savory items at the HEA party are cheese cubes. There are a few fruit options near the cheese, but the emphasis on this dessert party is definitely dessert. Unfortunately the desserts simply weren't that great, in our opinions.
The SW and FEA parties, on the other hand, have excellent and a bit heartier savory options, allowing the party to work as dinner and dessert. We also found the dessert offerings at the SW and FEA parties to be more creative and better tasting. And, of course, alcohol is included in the SW and FEA parties, but not at the HEA party.
The garden viewing section, though, is really a wonderful aspect to the HEA party, so I do think you will be happy with your decision to reserve this party, and, perhaps like the previous poster, you'll find plenty to love about the whole experience.