I'm going to Trinidad for the summer and I won't be able to buy string down there. I can, but they only carry Wilson NXT and stuff like that. How many sets of string should I buy? I'll probably be playing 4-5 days a week for 3 hours. I'm buying new 2 racquets next week before I leave and I'm stringing them with BBALU-P16L. How many extra sets of string should I bring with me? I don't think I'll break them but I just started using BB so I don't know how long it takes to lose tension/playability.