I am coming to La Quinta with a few friends for a girls get-away weekend in mid-August. I realize that it is going to be very hot while we are there. We'd like to go see one of the parks and do a LITTLE hiking. Is it unrealistic to think we can hike at this time of year due to the heat? We were thinking of going early in the morning and just want to see a bit of one of the parks. Also, any suggestions on which park to visit?