Me and my girlfriend, well fiancée now, have always had a very active sex life, I'm 17 and she is 16 (no lecture on getting engaged at such a young age, thanks.)
Although, when we first got together (10 months ago), I was at work usually and she was at school so I could take some randoms days off holiday, she could stay off school and we would have my empty house all day to do as we wished. When she got a job it became harder to get some time alone and we would need to have a quick "session" whenever our parents went out and we've even gone behind two different schools at night, the cinema disabled toilets, on some grassy area off the side of a road, so we're pretty open for experimenting and stuff.
Now, its the summer holidays, we're both off work for now, although my younger sister is off school meaning she is in the house alot, my fiancée is going to college after the summer ends so waiting until my sister is back at school isn't an option really as my fiancée will also be at college and by the time she is back everyone else will be home.
I've looked into hotel prices and stuff but I was wondering, anyone got any ideas on places we can go, things we can do to have the great marathon sessions we used to love?
A car? You are more lilkely ot know the quiet places in your local area than anyone else though.
Really, if you are engaged and your family is fine with it then there should be no problem doing it when other people are home. Just lock yourself in the bedroom, tell people not to disturb you if necessary and keep your volume down. If you are worried about noise then put some music on to cover it. My parents never cared about me doing it in my bedroom as long as we weren't too noisy.
How about a picnic lunch or dinner? Pick up some KFC, take a couple of blankets and pillows along and go out along a bike trail or hiking path. When you find a likely spot, go off to the side of the path and set up your picnic.
How about a beach? Are there any lakes, streams, or ponds nearby? Many beaches have secluded areas.
Arutha has a good suggestion. Modern automobiles are a bit cramped compared to the big cars of the '70s and earlier. So, take a drive out some country road and find some wide spot or better yet, a driveway into some unused field--not a house. (Scout this out sometime during the daylight.)
if you go to the beach do not forget the blanket and be careful, sand and sex do not mix
one place that is odd but exciting is behind a chirch at night