dont second guess your self. its all mental dont worry if you can handle it. YOU will handle if your mind tells yourself you can. my friend walked into BC (well it was marine BC) 200+ pounds, came out 170 ish. all mental. if you wanna be there, if you wanna be a sailor, youll be one.
its as hard as you want it to be. remember, the harder you work out in boot camp, the better the benefits.