Have you had any experience with taking dock-side tours in any or all of the following cities from LOCALS, rather than Ren shore excursions? Hong Kong, Guangzhou (Canton), Da Nang, Ho Chi Minh, Bangkok, Singapore. Ren prices for shore excursions seem to range from overpriced to outrageous. In December, my wife and I will be doing the foregoing cities on the R2 and would appreciate any info on buying tours from (English-speaking!) locals at dockside. Many Thanks!
I suggest you search the internet...I know people who have arranged tours locally via e-mail and done very well in terms of both cost and the guide. Go to the government tourist sites and you should find a list of local ground operators there.
Once you get out of the Caribbean and Mexico, the price of tours goes up steeply.