You mention that a place with a lot of reviews is one you consider. The trouble with that is that a large camp will get proportionately more reviews than a smaller one. A 500 site camp is likely to get 5 times as many reviews as a100 site camp.
To offset the disparity, we use the rating system. A large camp can easily achieve high ratings due to high income..
A small camp with high ratings shows us that income is put back into the camp.
Its not the # of reviews, but their quality from reliable sources. When a questionable review is seen, read their previous reviews to determine whether their criteria are also yours.