Great advice in your post Michele!
Friends and I attend a local open figure painting session with and I do a very similar thing from time to time. Sometimes we each do it alone or as a kind of party. We have a goal to do as many paintings in 12 hours as we can with a minimum due at the end of 10.
You will be a amazed at some of the great work or at least great learning done in those intense 12 hours. Sometimes we have a model sometimes not. It's great to clear your mind of everything else to work like that.
You start to paint everything in the studio it always amazes when you push your self how you improve. And it's a ton of fun. And yes, sometimes we bring a few bottles of wine, but you have to be careful not to get any paint on your glass.