Its good to have weapons, but there are also items that will aid in a successful hunt, the most useful is the Radar.
They don't cost any points, but some do decrease the points you'd normally get on a hunt without using them.

Tranquilizing a dinosaur is an alternative to killing it. This will drop the dinosaur where it stands with a quick-acting drug. Use of the Tranquilizer adds 25% to your total points acquired during that hunt.

This item allows you to mask your scent from all dinosaurs reducing the likelihood of you being spotted. Use of the Cover Scent deducts 20% from your total points acquired during that hunt.

This special suit decreases the dinosaur's ability to detect you through sight. Use of the Camouflage deducts 15% from your total points acquired during that hunt.

It doubles the amount of ammunition for every weapon during hunting session

This allows you to view the dinosaur locations on the map during your hunt. A dinosaur is depicted on the map as a green dot. Your location is shown as the red dot with the circle surrounding it. Please note that the map shows only the dinosaurs you are hunting. All other dinosaurs are masked. Use of the map deducts 30% from your total points acquired during that hunt.

Selecting this will allow you to call in a resupply ship that will drop a bag full of the ammunition for each weapon you have taken on your hunt. This can be used only one time per hunt and will drop the bag on the location you have requested it.