Never been to Parker.
The Parker Strip is cool, you can run up to the dam at the south end of Lake Havasu float down for a while, run down a little and hang out at the lower dam across from the Blue Water Casino.
Caution: Early AM is good, Saturday afternoon gets very choppy, Sunday afternoons are good, weekdays are wonderful most of the time.
Just be aware that the cove/sandbar across from the casino can get a little crazy/tacky for the little ones. My 9 year old daughter was not as impressed with the g-strings as I was
