So I built an electric mountainboard... I really want to try it out here but don't know how well it would handle. It rides gravel and grass fine but I'm too scared to jump it. Would I have some fun here?

Yes but you need grippy tires or you will wipe out and good suspension

The gravel trail along the outside of the park is a very safe place to try and ride and shouldn't give you issues. I would look into the rules on whether or not you can ride electric things on the actual trails.

I'm actually not sure if motorized vehicles are allowed. However, if they are, they have 2 pump tracks (beginner and advanced) as well as trails that you might enjoy.

If you lived close it wouldn't hurt to go check it out. I seen a guy on a off-road skateboard of some sort trying to jump the jumps when I was there last time

They say no motorized past the parking lot... Not sure if that entails the gravel path or not. As long as I'm being respectful it hopefully won't be any issue. EDIT: I have gone a handful of times and it was awesome. I mainly stick to just the dirt jump lanes. I only try to go at the least busy times. Here's my first visit: https://youtu.be/KZ8KRRaIshY

It's not really the place to ride your mountainboard.