Chaos vehicles bouncing

Building on my previous post, i now have a utility setup that pulls information from a CSV file, creates a spline from it and “snaps” it to the nearest mesh/landscape/Z collision object.

The utility spawns what i call “haul spheres” that move along a spline at my intended pace and meets key points at appropriate times. As part of the sphere actor, before the spheres move anywhere, they spawn chaos vehicles, constrain themselves to said vehicles, and essentially “pull” them along the spline path. This results in vehicles being where i need them to be at the correct times.

I am running into issues with the chaos vehicles and the physics with them. If they hit a bump or a weird point in the landscape, they will be sent flying, same thing if they hit a blip in the spline. I am wondering if this is not the best way to approach this sort of thing. The end goal is a visualization/rendering involving the vehicles.

Would it be better to just animate meshes that are pulled along the path? If so, where would be the best place to start for creating simply a mesh with variable speed spinning tires?

Thanks!

Here is an illustration of the system for visual aid: https://www.youtube.com/watch?v=2MGGlIfboZ4