not a pro as some have said, but going from your list,
I would take the 7100, the point and shoot, leave the 3100 at home.
unless you plan on shooting in close in dark, you can leave the 50 at home, since the18-270 covers it. ditto the tokina. without a tripod, I can't imagine any macro work will be viable, so leave that one home too.
do the filters you plan on taking do anything for you lightroom won't?
removing the 3100 from the equation also removes the batteries and chargers.
remember the crop mode for the 7100 will give that 270 another distance factor, probably out to the 310 range if not a bit further.
don't swaet the gear, even if you don't catch that distant elephant, the memory will be wilth you. enjoy the trip, and don't waste the time fussing with equipment