I've been living in my pickup truck for about a year while rock climbing, skiing, hiking, and not working. A pickup is not a van, and definitely makes things like cooking or just hanging out less enjoyable. Regardless of the space constraints, the biggest thing is the loneliness of the vagabond lifestyle. I actually kind of miss my coworkers. Most connections are ephemeral, like climbing with someone for a day before they take off to LA or Oregon. There's also some stress with finding places to park at night. You're almost always staying somewhere where you shouldn't quite be. I've spent some entire days just surfing around on the internet, not motivated to really go out and adventure. I'd agree with this blogpost
https://theinspiredclimber.com/2014/05/14/romancing-the-dirt..., "don’t expect going on the road alone to fill the void in your life."
Like the parent commenter, I too have spilled my pee bottle in my living compartment.