Well, not to put a damper on your idea, but...
The way the parking works is that everyone's marshaled into a huge parking structure and led up to whatever level they're currently filling by attendants and hundreds of orange cones. Once there, you're led into a spot as they fill the levels row-by-row and space-by-space. In all likelihood, your Bronco will end up sandwiched between two rented minivans, smack in the middle of a row, and smack in the middle of the level.
Yes, it would be great if you could "get there early and park in a primo spot" but it doesn't work that way. Given the volume of cars arriving to the park on any given day - particularly on weekends - letting everyone just roll in there and try to decide where they want to park would really slow down the process. (Think of the chaos at a major shopping mall the Saturday afternoon before Christmas, then multiply by at least 20.) Doing it the way they do it gets cars parked at the most rapid rate possible, which gets everyone into the park quicker, avoids traffic backups on nearby streets, etc.
What you might consider as an alternative is to book a room at one of the motels that are located on Katella or Harbor, and arrange with the manager to save you a spot out in the front along the sidewalk. Then you'd have your Bronco out where lots and lots of people can see it. (There's a huge amount of foot traffic on any given day as people staying overnight walk from their lodging to the park entrance.)
