|Subject: Re: Vietnam and Cambodia|
You can see about my experience in Ho Chi Minh City (Saigon) and Siem Reap in my Asia trip report at http://staff.mwsc.edu/~mcgarrel/asia2002.htm
This has links to hotel booking services and lists of hotels; you should be able to get something nice for well under $75. In Siem Reap, it worked pretty well for the driver I got to take me from the airport to the hotel to become my driver for the whole trip. For a guide, I used the guidebook that kids are eager to sell. The Angkor temples are spread around the area and it was nice to have my own transport; I don't know if I could have latched onto a tour upon arrival.