If I could stay at a campground where I could safely leave my tent and all my kit so that I could day ride, I would like that. But I can do it loaded. Either way. I can camp quite comfortably. What sort of night time temps should I expect?[/QUOTE]
Check your 10 day forecasts along your route. I'd expect that anywhere away from a coast at 5000 ft this time of year that 20 Degrees at night would be a cold spell and 40 degrees would be a hot spell.
.......then add or subtract 3.5 degrees per 1000 feet of elevation change.
Have a nice trip. This is a great time to go to those places.