Hi all,

I'm planning a 15 day road trip in Arizona and Utah, but I'm still in the early stages.
My initial route is the following:

Arrival in Phoenix
Phoenix to Grand Canyon (south rim)
GC to Las Vegas
LV to Zion
Zion to Bryce
Bryce to Antelope Canyon
AC to Monument Valley

From here I'm a bit lost.
If I still have days left where would you recommend me to go?
I have to fly back from Phoenix, so it's a long drive from Monument Valley!

Also, is late April/start May a good time overall to travel to these destinations in terms of weather and tourist crowds?

Again, this is the early stage of my planning - any suggestions appreciated. Only thing that is certain is my arrival and departure from Phoenix

Thanks
Henrik