We will be pausing in Bangkok for two nights en route to join Ngaire et al for the Singapore - Sydney Mariner cruise beginning Oct. 24th. We've never been there before, and will have limited time (Friday afternoon, Oct 21 to Sunday noon, Oct 23). We would appreciate any and all info/guidance re:
1. What are the "do not miss" things to see?
2. Can anyone recommend a reliable private tour operator or guide?
3. We've been steered to the 5 star Shangri-La and Peninsula hotels, with the Peninsula just a bit more money, but the Peninsula appears to be on the "wrong" side of the river? We want to stay in a great hotel there, but not waste our too limited time getting to and from the places we want to see and visit.

Any other advice or suggestions will be most welcome.