The takeout has a history of car break-ins. Be careful or find an alternative parking spot. Like stated above, the take out requires a short carry under the railroad bridge and over/through some steel and concrete posts, but it is doable with a little labor.
In my opinion, water level will not be a problem for rafts up to 18'. BuRec always keeps enough water to satisfy the Redlands diversion in GJ and that is always enough for floating. There are a few rocky spots, but I have never had a problem.
I suggest brining some earplugs for sleeping as some of the camps are very close to the railroad. I remember one night when the train went by about 12 times in the night and it woke everybody up each time. The tracks were just across the river from us, but it sounded like the train was coming right through the tent.