I want to make a map of Jedediah Smith Park in Redwood National Park

[jpr28x]

There are 3 points in the Middle of Jedediah Smith Park I want to get to. Its in the Northern area of the Redwood National Park. I have a Garmin eTrex Legend CX . How would I go about doing this. I am clueless. I have no maps other than the basemap as of yet.

What do I need?

[jpr28x]

THANKS

I am going to get the HCX instead.