1、"bacckpackers" are a group of travelers who like outdoor activities and who are interested in traveling by themselves.
改为非限："bacckpackers",who are interested in traveling by themselves,are a group of travelers who like outdoor activities.(其实就是换一下位置)
2、help改为contribute to
3、I think that用as far as i am concerned
4、有并列的可以用not only ...but also...
5、What's more,it will help you open up your eyes and make you wiser.It benefits us greatly.
改为非谓语：What's more,benefiting us greatly,it will help you open up your eyes and make you wiser.
【高三学渣的一点建议】