Is there adequate parking for Semi's?

Yes

Yes their is definitely

Yes, Petro and surrounding area has lots of parking. Most parking cost for Semi, however if you buy enough food/fuel/supplies etc you can get for free

Generally there is lots of room. Depends on when you arrive. The recommendation about the casino parking was right on. Satellite view will help you to plan your approach for either.

And if it's full the casino down the street from the pilot has plenty of truck parking