I'd wager it was the latter.Did her parents even want to go camping or did she throw a tantrum about having to travel by herself to Exeter and forced them to accompany her there?
There's a moment in the video where she's loading her stuff in her camper van that's very telling. She says "My parents are going camping for a few days in Devon whilst...(awkwardly looks like she's said something she shouldn't have)...umm...after dropping me off." It definitely seems like she was about to say "whilst they wait for me".