One thing I like about overnights (with the right girl), is sex can feel much more natural. I enjoy the flirting aspect over food and drinks. As time isn't a major factor, sex can just happen. On some overnights, I've had sex in public places - up against the wall in a city centre street, in a public square etc. (3am ish). When younger I must add. You just can't do that on a 1 hour punt. Some WGs can get pretty wild on an overnight, so they can be fun.
My normal thing for overnights is sex when she arrives, out for a meal and drinks. Back to the hotel more sex, maybe watch telly for a bit, more sex. Sleep for a bit, then sex in the morning. So sex on average 4 times during the overnight. On most overnights I take sexy pictures too. So for a £500-00 fee, not bad vfm.
If I only got sex twice, I'd be pretty unhappy, unless it was my fault.