It can be easy as long as you prepare well. Make a stone box (I use a 2x2) and place a generator inside it with plenty of gasoline. Then hook up two to five turrets on top of the box. Make sure they are on target wild creatures and have the highest range. Also, they can be auto turrets or heavy auto turrets. Make sure they are filled with plenty of bullets( 400-100 should be good enough. You can put more if you want. If you have a crystal wyvern, you can outrun these things no problem, and just lead them to the turrets. If you have an argy or pteradon, put the box closer to where they wyverns are. Just shoot them from a distance and lure them to the turrets. I nice they are all dead, You can go and take the eggs