Yes you can... Any types of cams are allowed there.. big or small, lol... ;p
AngKor Wat is situated in Siem Reap, can take a plane from Singapore or by bus from Bangkok, etc.
It's a very big place to explore, therefore it is good to read up on where you want to go from guide books before actually embarking on the trip itself.
Generally, the people are really nice, food so-so, but the view is really spectacular!
Oh, you can "hire" guides there to bring you around on bikes, or else, you can cycle or vroom around in rented bikes.
I meet a local who could speak chinese, therefore kind of great to mingle around. I still has his namecard, so if you need help there, can pm me for his details.
Have a good time!
Cheers,
Zapline.