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I'm taking the LSAT in October, and can't decide if it will be worth it for me to take a course. My problem is that I won't be in one place for long enough to take any course longer than the Powerscore weekend course. I was thinking about taking the Powerscore virtual course, but I don't know if it will benefit me that much. I haven't done done much practice yet, and I scored a 167 on the diagnostic I took last spring. I'm looking to score at least a 170 on the actual LSAT (preferably in the mid-170s since my GPA is a bit on the low side for many competitive law schools). Are these classes any use to someone looking to go from a good score to a great score, or will I find that they aren't much help? Any suggestions would be great!

If you did that well on your diagnostic, I would recommend just buying preptests and self-studying. That should work better with your moving around as well.