I created some Google Maps layers that show the walking path (called “Garden Walk”) between the on-site hotels and the park entrances. It includes markers for the boat docks, bus dropoffs and security checkpoints, as well. You can enable just the items you want to see. (For example, you only care about the walking route from Aventura to Universal Studios Florida.)
West Side – Cabana Bay, Sapphire Falls, Royal Pacific
https://www.google.com/maps/d/viewer?mid=1rqDurcJoaW48Ppmmxk-yXpuHxbJphBA3&usp=sharing
East Side – Hard Rock, Portofino Bay
https://www.google.com/maps/d/u/0/edit?mid=12rcfdPcjgizN3UQ8KPZqchAdG1eJUxF1&usp=sharing
Enable the “Legend” to see the different layers you can turn on.
Please comment if you find any mistakes, or if you have items that should be added.