Good hike plan. I did something roughly similar in October.
The two or so creeks that I'm talking about are BETWEEN Deer Spgs & LRV. You've probably already got your permit, but one way to do it is to go straight to LRV instead of going to Strawberry Jct. The water at LRV will more than likely still be flowing, but I don't think there will be anything near Strawberry. There is one small creek (Marion Cr. if I'm not mistaken) near Strawberry, but it is the opposite direction from LRV, and it's usually dry. I wouldn't count on Marion Cr. for water this year. There's more reliable water at Strawberry Cienaga, but again it's the opposite direction, and I wouldn't count on it this year. See:
http://www.topozone.com/map.asp?lat=33. ... &layer=DRG
What I did for my October trip was:
Day 1: Tram to LRV
Day 2: LRV to Laws
Day 3: Laws to Tram
I knew the water was fairly reliable at LRV & Laws, so I planned around a) water, b) where the camp sites were, and c) getting out early on day 3 to get home and clean up and all.
If all else fails, of course there's always dehydrated water...
Seriously, have a great hike. SJ is fabulous hiking country.