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If you can do what Squid24 said on the trip, do it.
But since you're on a trip you likely wont. Try doing an endurance routine or something so you wont feel tired on the trip.
(I assumed the weight...

I still haven't gotten to 2 plate yet.
I hope to be up there with you guys soon enough though.

Try to lift weights too, no matter how much weight you lose if there's no muscle it'll look bad.
Props to you for losing 15lbs though.
Try counting calories too, it will make things easier.

100+23,410 = 23,510

3x5, twice a week (Only counting the past three weeks)

Your dining hall should have some knowledge about the calories in the food, just ask an employee.
Or ask one to prepare a meal a certain time of day and they will.

My school has ChartWells, so...

I did but I thought they looked at me like that was because they just didn't like me.

I lost around 30lbs in 3 months. I had a small amount of loose skin, but that was only noticeable if i tried pulling it.
You'll never know until you lose the weight, just try it!