We are having a spurt of good weather this week and forecasted into next week. You can plan on 70 - 80 on the west side of the mountains and 80 - 90 on the east side.
There will be lots of vacationers - so plan for lots of cars on the roads. And, I hope you have reservations for camp sites. People are into staycations this year due to the high gas prices. It's all I hear about on local news channels.
All in all, it should be a nice vacation for you. Be safe and have a great time!