how could i make these two sentences better.

In the south pacific mountaintops there is vast number of forests. Hunters from this mountaintop civilization find it extremely difficult to hunt with the burden of the forests.

1. Put capital letters in the right places.

http://grammar.ccc.commnet.edu/grammar/capitals.htm

2. Make sure subjects and verbs match (agree) with each other.
http://grammar.ccc.commnet.edu/grammar/sv_agr.htm

3. Use commas in the right places.
http://grammar.ccc.commnet.edu/grammar/commas.htm
See #3.

4. Clarify the last six words; that phrasing doesn't make sense.