Going to my first ever RV show -- what should I look for?

Look at anything/everything that interests you. Most models will have a floor-plan diagram outside so you don't have to go in if it doesn't suit your needs. If your knees are creaky like mine, pace yourself.

Sometimes the dishwashers are locked or there are signs that say "don't sit on the bed" or "don't open this closet", but anything else is free game. If it's openable - open it and have a peeker.

Watch your head for those awning arms that can jump out and smack you. :B