How easy is it to get to these parks and how much of an "adventurer" do you need to be to explore them? My husband and I like to explore while on vacation, but only to an extent. We are by no means "adventurers". If we do go, how much time do we need to allot for the parks and how easy is it to get around and find our way once we are in the parks. Also, are they well traveled or will we often find ourselves alone? Thanks for the help.