I dont have one but I would suggest a Honda Element with AWD it has a rubbermaid interior, it is funny looking but that makes it good for interior space, you could get a hitch rack or keep the bike inside. I think mid 20s for mileage. I have known 2 people who had them and the cars were reliable as heck. They came with a built in inverter. I think the back seats fold down to a bed as well. I think they stopped making them so only option is used.
I wear headphones not earbuds, on less technical trails when I ride alone. I keep the volume low and try to check behind me often. I would say 70% of joggers I come up behind have earbuds in and have no idea I am behind them. no worries just take it easy. the music helps drown out the other voices in my head.