On an 11 night trip I am considering going to Siem Reap/Angkor Wat for 3 nights and 2.5 days in June after spending 3 days in HMC Vietnam. I know it will be hot with the possibility of some rain. In general is it usually so bad as to make it impossible to enjoy the outdoor sights or hang by a pool at a luxury resort? Has anyone been there at this time of year? Is my time better spent in Central or Northern Vietnam. Also how bad is the mosquito situation in June there?