Bottom insulation. You will need something unless it is +70F. Try it at home before you hit the trail.
+1 on this. There is a learning curve to setting up your hammock for the most comfort. Try it out several times. If you can, take it to a park or somewhere close by your home that has several sets of trees and setup you hammock using several different pairs of trees. This will give you practice in setting up your hammock for comfort in different area.