Issue Backing into Camping Spot

Thanks for all of the incite everyone. I'm ok with the backing in part. I've backed enough smaller landscape type trailers and flat bed trailers to understand the concept to the point that I don't really think about it anymore but I can see everything with those types of trailers. My issue is knowing when I've pulled past the site entrance far enough to begin backing into the spot because my view of the passenger side is blocked because of the size of the camper. Trying to get a good view of the tires in relation to where the entrance is, is a good idea and I'll try that when we start season 2 in May. We do have walkie talkies and I've tried to use them with my wife but I guess she gets too focused on watching me and forgets she has one in her hand to offer assistance. I'm also not comfortable with her ability to tell me when to stop or when to turn right or left. I know it sounds like I'm bashing her and really I'm not. She's a great woman and I love her dearly but helping me get into a campsite is just not her strong suit. She's more the type to make sure she brought her hair dryer and that her "camping clothes" are coordinated than the type to start a campfire. That's why I was shocked when it was her idea to buy a camper but it turns out that she loves it. It's a social event for her and she'll know pretty much everyone's name in the camping loop, will have exchanged email addresses, become facebook friends, shared recipe's etc. after one day while for me it's a time to forget all about work and life's issues and relax. Funny how women will become fast friends and talk up a storm with one another while guys are perfectly content during this process saying three word sentences to each other "want a beer?" "where ya from?" "That a cummins?" "Good lookin Dually!" HAHAHAHA