Hi,
I did some section hikes over past year or so in that area (I-8 to Ca-78). Here are some camping spots / water location which might help. Hard to say on water though as I've not been up there in few months. As well some of the campsites close for season or close portions - so best to call.
Maps - for online, download google earth and then Half miles PCT tracks and waypoints. You can google it - it's free download. He marks good camping spots, road crossings etc. Great to get an idea of trip ahead of time.
Also Cleveland national forest - I have a detailed trail map, can't recall company, but I found online and they put that plastic coating on it so ok in rain.
Here's a web showing Laguna Mt Recreation Area. note that remote camping is NOT allowed in this area. I've never seen a ranger enforcing - but best to avoid - just camp before or after this area.
http://lmva.org/trails/map.htm
Camping and water sites (listed from I-8 heading north). Mile listings are from Hale mile's goole earth track.
- Mile 32/33 (Fred Canyon Rd). Camp just before crossing Fred Canyon, nice flat spots where PCT crosses the creek
- Water usually at Cibbet's flat campground, about 1 mile off trail - take Fred Canyon Rd West.
- Mile 36-38 - bunch of good flat sites to camp - marked as "CS036" etc on map. PCT follows some season creeks in this area
- Mile 41 - Burnt Rancheria Campgound - might have water, but not sure if closed for the winter. Camping here is costly $20 (I see no reason to pay this when such great areas nearby).
-Mile 47.5 - Cross road to Laguna campground - usually have water, but best to check ahead
- Mile 56 - can camp amongst large boulders, long as you have good pad, it's a nice area. Sometimes strong wind though
- Mile 59.5 - Sunrise trail - less than 1/2 mile west are bathrooms, no water though. You can camp in field next to Sunrise trailhead but it can be very windy
- Mile 64 - really nice flat area in chariot canyon - especially good if winds are blowing, very protected in the canyon
- Mile 68 - Rodriguez spur truck trail - near fire tank
- Mile 77 - Scissors crossing, some areas to camp - though not great
good luck, Rob