My fiance and I will be in Siem Reap and Phnom Penh throughout the first two weeks of January. We're on a REALLY tight budget (both university students), and we were looking at budget guesthouses and hotels. Dara Reang Sey & DV8 are our choices for now.... Fan rooms seem to be considerably cheaper. Is the AC an absolute must this time around? Also, if we were to keep our windows open, what is the risk of theft?