Washingtonians dreaming of a summer escape from the region’s recessionary gloom should take heart: It’s a great time for a cheap vacation. But the best deals likely won’t last for long. At the end of April, lots of hotel, airline and travel package deals run out. And, with gasoline prices rising and airlines adjusting quickly to less demand, only the most flexible travelers should wait until the last minute. For everyone else, here’s The Examiner’s guide to getting out of town and making the most of your dollars.