Yes you will be fine with a 4x4 they have large wide bypasses the actual obstacles you can't do but getting to where people are wheeling is totally doable
With the long wheelbase you should stick to main trails. You can print trail maps off of their website. And i believe you can get a paper copy at check in on site at the park. Have fun....
To be honest I don't know... Everyone driving out there had 4x4s... Lots of "mini" canyons, gulches and rock crawls to navigate! I'm a beginner, so I recommend checking their website www.gulchesorvpark.com
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