The school usually raises about $9,000 through contributions from local businesses and fundraising events, Maggy said.
Right after the May 17 prom, students will be bused from PHS to Stafford Middle School for the party, which starts at 11:30 p.m. and continues until 4 a.m.
In years past, between 180 and 200 students have attended the party, Maggy said.
"I think they look forward to it as much or maybe even a little bit more than the actual dance. It's really a fun, safe evening."
The Backup Plan, a student band, will play as people arrive, and there are many activities to entertain them, along with plenty of food, Maggy said.
Students can swim in the pool, play inflatable or carnival-type games and enter to win donated prizes.
Crafts like sand art will also be available for students who aren't interested in playing the games, Maggy said.
One of the most popular attractions are the two massage therapists that the school employs for the night, she said.
Hypnotist Michael Blaine's show is also well-attended.
At the end of the night, some students will win $100 in raffles or other prizes, such as gift certificates.
Blaine will also perform that same night at Northeastern Clinton Central School for prom-goers and their dates.
After students enjoy the dance on the Spirit of Ethan Allen, they'll be bused to NCCS for the party, which will last until 5 a.m.
"I think (prom) does increase underage drinking and the pressure to go to parties," said NCCS Principal Stephen Gratto.
Without a school-sponsored party, "people would be scrambling to find a cool after-prom parties to go to," he said. "It takes a lot of pressure off the kids."
Lina Birch, chair of the NCCS After-Prom Committee, is originally from Montreal, and she said students there often go to nightclubs after the prom and engage in potentially dangerous activities.