Definitely if it's a reasonable request. I'm not going to get out in traffic and drive someone somewhere during rush hour if I myself would not even go out at that time of day.
Are you ever amazed at how bold some people can be concerning requests?
I try to sleep on my back as much as possible. I normal fall asleep on my side and then roll onto my back. It feels great to lay on my stomach. But, I get a stiff neck really fast when I do that.