Sounds like an excellent plan!
When I am doing "unique" projects, I sometimes let the perfect become the enemy of the good. I would perform your project according to your best plan, and then be willing to make some modifications when the cattle decide to not quite follow your new "guidance" correctly.
Have fun on your project this spring! If you do find an innovative solution to creating a good cattle access point, you might want to come back and post some guidance on the forum. Lots of people from the Gulf Coast to the Canadian border have the combination of ponds and the cattle that like to destroy them.
