listen buddy,
i am in the class of 2014. like all the comments above have said, if you can work with it, go with it. You will not get kicked out for a calf strain or pain or whatever you have. There are so many chit surfers during plebe summer (people who pretend to be injured or milk an an injury so they will not have to participate in the phyically demanding tasks of plebe summer) that you will see your injury is not soo bad (some people chit surf for months, even into the ac year). even if you do have to go on chit and rest for a couple days, do not be ashamed. so long as you do not milk or take advantage of your medical condition, which it sounds like you will not), you will not be seen as a chit surfer (the lowest on the totem pole). btw, what company/platoon are you in for the summer?
also, one quick tip, memorize "invictus" before you go. as well as as much of reef points as possible, such as "man in the arena," "qualifications of a naval officer," "rules of the road poem," and MOST DEFINITELY the three things which you are supposed to show up knowing: the mission of USNA, chain of command, and first three general orders of a sentry.
Message me if you want more information about pretty much anything.