First you must ask her why she doesn't want to go camping.
I am not a fan of camping because we live in the 21st century where we have houses with central heating and air. There's no creatures roaming about except for our cats and there aren't any bugs.
I did however have a pretty good time at an SCA event where we were camping for 3 days - which we did while wearing renaissance & medieval costumes the entire time. Maybe if you reassured her that some of her comforts would be met, she might yield a little bit. My requirements are pretty simple: a good air mattress, adequate access to a toilet and shower, and a promise that I didn't have to cook the entire time.
You can try to convince her by making it sound romantic, if she's into that. Find some activities that you can do together - not just hunting, fishing, etc.