I fish Hubbard often and put in at John Paul Jones Park and paddle to the creek under both bridges. It's not bad if it's calm. When the wind picks up it can be a chore.
I have seen people park in the grass next to the Rowlett Rd bridge but I'm not sure how they got down there, if it's allowed or I'd get stuck? If anyone knows this for sure please chime in as it would save me a lot of paddling time and make for more fishing!