You might be asking a lot for one pair of pants. Some of your criteria seem to be somewhat in conflict. For example, if they provide 'extra warmth in camp', then they are likely to be a little too warm to be an ideal hiking pant. I also personally don't think it's a great idea to use the same pants as both hiking pants and rain pants, since even the best DWR will fail in extended rain, and WP/B pants (ie. eVent, GoreTex) are always too stuffy to be a good hiking pant. The exception may be if you normally only get light and short rains or you are okay with getting your legs wet, then you could use a DWR coated pant as both hiking pant and rain pants.
You may want to considering separating these needs into a few garments instead of just one. For example, you could pick up some 4oz BPL Thorofare pants which are very comfortable, lightweight and quick drying hiking pant and they are capable of handling light rains with their better than average DWR coating. Then on cool trips you could supplement these pants with some tights worn underneath (ie. 5-6oz) and on rainy trips you could layer true WP/B rain pants (4-6oz) over top.
If you try to do this all in one (hiking pants, rain pants, warmth), you may end up with pants with mediocre breathability, mediocre rain abilities and a bit warm for hiking in, while maybe too cool in camp.
I personally use:
– Patagonia Sol Patrol Pants (7.0oz) – Hiking Pants
– GoLite Tights (5.3oz) – Leg insulation on cool trips
– GooseFeet Down Pants (7.3oz) – Leg insulation on cold trips
– MYOG Cuben Pants (2.5oz) – Non-breathable Rain Pants (for fairly dry trips)
– GoLite Reed Pants (4oz) – Breathable Rain Pants (for wet trips)