Going upriver is hard because the water is so muddy you cannot "read" it . All of the South side is fine but watch for obstacles that are getting taller! Once you get by the mouth of the river there are no problems. I would keep an ear open for peeps having problems on the CA side (no wake) side. So far I have not heard of any major problems. I would stick to that side if you want to go upriver. Have fun.