CULP is reported to be competitive, but I don't know the ratio of applicants to participants. Cadet Command says the goal is to have at least half of all cadets participate.
Also there is a timing issue: applications must be submitted in the late fall, and your PMS will have to recommend you. Similar to other summer programs, you would have to be contracted. I don't know how this works for you as a 3-year advance scholarship awardee. (Congratulations on your scholarship)
From the descriptions I've read or heard, CULP is a wonderful opportunity to experience another culture. You may find yourself working on infrastructure projects or teaching English to foreign military personnel. Cadet Command is sending people to countries all over the world. Some points I've gleaned which would enhance the experience:
If you don't speak the language of the country you're assigned to, make some effort to acquire what you can of the language. There is sufficient time between school's end and your reporting to Ft. Knox. Even if you have some previous exposure to it, bring a dictionary with you. Make an effort to communicate in the local language and remember, just because people don't speak English, they are not idiots. Whatever their level of intellect, it will not improve if you speak louder.
You are not there to proselytize for your particular religion, despite its superiority to all others (including those of your fellow cadets).
Keep in mind that you are a representative of the USA, the US Army, ROTC and your battalion. If you act like a jerk, word will work its way formally or informally around the world. The return to campus next month may be uncomfortable for some.
The US consulate may offer to convert your money to the local currency. While this will undoubtedly be a good deal, retain some of your greenbacks. Otherwise, you will see why when you try to pay with Thai baht or Malaysian ringgit at the Cinnabun or whatever at Louisville airport on the way home.
Do your best to get exercise while overseas. See below.
Local beer may be cheap and delicious, but don't get too familiar with it. The debate over whether one buys beer or merely rents it will long persist, in either case you may end up wearing it.
Fellow cadets who laugh at you at Ft. Knox for bringing beef jerky or a canister of protein powder will not be laughing when they are served up rice and mystery meat stew at the Kampala mess hall. Oh, by the way, especially if you are in a third world country, you are likely during your stay to develop shall we say intestinal discomfort. You are not dying and it will pass in a day or two. Keep taking those pills.
At some point you will go sightseeing by bus, stopping in a quaint village or at a market for souvenirs. If you are still negotiating as the bus is preparing to leave, and you find yourself handing the vendor a 20,000 piastre note through the window for that Buddha carved in soapstone, don't be shocked if he doesn't hand back change.
Hanky-panky? No thankee.