Thanks, everyone. We did decide to do the ferry, though I think I'd skip it next time. We needed to unhook the car and dolly and do the crossing in 2 trips, so all in all, our 10 min river crossing took about 2 hours. The ride to Cameron was a pretty drive, but once we crossed over It was mostly oil refineries. Also the dip going from the ramp onto the ferry was so low the back of the RV was scraping, NOT good. Unless you're a smaller rig, I think I'd head up to I-10 just before Cameron.