言い方はいろいろあり、motorhome, travel trailer (トレーラー)もキャンピングカーを表しますが、RV( Recreational vehicle)が1番一般的です。
関連
I wanna travel across the US by RV.
キャンピングカーでアメリカ旅行したい。
Have you ever driven an RV before?
キャンピングカーを運転したことはありますか？
A common vehicle used for camping is called a caravan.
It normally contains a kitchenette and small bathroom as well as a bed and sometimes a small living space.
"I'm going on holiday with my girlfriend, touring around the US and sleeping in our camper van."
"What kind of van is that?"
"Well, it's not really a van, it's a mobile home."
That sounds great!"
"It's made by Volkswagen."
"Oh, I know. It's a typical surfer's caravanette."
caravanette =a motor vehicle with an area at the back that is equipped for living in
"I'm going on holiday with my girlfriend, touring around the US and sleeping in our camper van."
"彼女と休暇でUSに行こうと思っているんだ。寝泊まりはキャンピングカーでね。
What kind of van is that?"
どんなバンなの？
"Well, it's not really a van, it's a mobile home."
まーバンっていうよりは移動できる家みたいな感じかな。
That sounds great!"
かっこいいね。
"It's made by Volkswagen."
ワーゲン製なんだ。
"Oh, I know. It's a typical surfer's caravanette."
それ知ってる、サーファー用のキャンピングカーでしょ！
caravanette =後ろに生活整備のある自動車
The most common word to use is a "caravan."
Most people use the word caravan or camper.
It is a vehicle that you can sleep in when camping.
Examples :
We traveled for 10 hours and decided to sleep in the caravan.
We are going away for the weekend and going to sleep in the caravan.
「caravan」が最も一般的です。
たいていの人は「caravan」、または「camper」と言います。
キャンプの時に泊まることのできる車のことです。
例：
We traveled for 10 hours and decided to sleep in the caravan.
（10時間移動して、caravanで寝ることにした）
We are going away for the weekend and going to sleep in the caravan.
（週末に出掛けてようと思っています。caravanに泊まるつもりです）
People who go camping on holiday usually go driving to the sight where they want to spend their holiday time. They normally bring a 'caravan' in tow. The 'caravan' is a vehicle with no engine, and hence it has to be towed like a trailer. It is designed for campers to sleep in when they go camping on holiday.
So, you may say to a work colleague:
Whenever we go camping, on holiday, we bring our caravan along in tow to sleep in.
休暇にキャンプに行く人はたいてい車で行きますね。普通「caravan」を引っ張っていきます。「caravan」は乗り物ですがエンジンがありません、トレーラー（trailer）のように引かないといけません。キャンプに行って寝泊まりできるようにデザインされています。
Whenever we go camping, on holiday, we bring our caravan along in tow to sleep in.
〔訳〕休みにキャンプに行くときは、寝泊まりできるようにキャラバンを引っ張っていきます。
When referring to a car that you can sleep in there are many terms, all referring to different types of live-in cars.
A camper van is a larger sized car that you might traditionally see on instagram.
A camper car is usually smaller but still was modified for someone to live and camp inside.
An RV is a very large style of car that was built specifically for living inside of.
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