Nitrogen and air are two of the most common gasses to fill inflatable tires. Nitrogen molecules are larger than air molecules, making it harder to leak over time. With air in your tires, you may lose pressure in your tires and need to top them off more often.
If you've never driven anything larger than a sedan, it's going to take some time to get used to an RV. Other RVers aren't as judgmental as new RVers might think. Most campers are willing to help if you ask and understand the learning curve.
Get There Early If you're travelling in an RV, arrive as early as possible to check-in. This way, there will be fewer people around to watch you get into your campsite. If you're worried about possibly struggling to get into a site, arrive early.
Look At The Information Sheet Take a look at the information on how to get to your campsite. Notice the location of the laundry facilities, swimming pool, dump station, and dumpsters. Checking out the information will also help answer any questions about check-out time, quiet hours, laundry cost, dog rules, etc.