Travelling soon before September LSAT, how to keep scores up when I get back.

Hey, like the tittle states I will be travelling for 2 weeks due to the loss of a grandparent to a foreign country and I am having trouble conveying my worries to my parents that my score will decrease significantly when I return. I will return 2 weeks before the September LSAT but I will also be starting my courses for the Fall and working on campus. My first question would be, is there anything better to do then just downloading practice tests and trying to do sections when I have free time. Secondly, what is the best way to wear off the rust of not having been able to study consistently for those 2 weeks before the LSAT? Thank you for any advice!