I am currently staying at a Residence Inn Portland because my daughter is at the local hospital for treatment. So far I have been booking week by week not knowing how long she will be there. I noticed if I play with the dates online and book 3-4 week continuous reservation I can get a much lower rate than week by week. Can I book the month reservation online and check out say in 2 weeks if needed? Will I still pay the lower rate I originally booked?