Hi Ice baby, for the taxi, they will auto turn the meter on. if not, then you ask them to go by meter and pay accordingly. their drivers are mostly friendly, not to worry too much.
my fh and me did not go to suam lum but we did passed by the place few times, hmn.. think its quite easy to take a taxi back to hotel, cos the roadside seems busy. that place is kinda prominent cos got a tall pillar written with suam lum nite bazzar, no problem in getting there at all.
our trip, we stay at 2 hotels, one at suhkuvmit near Asok BTS, and the last 2 nite we stay at this Reflections near Ari BTS.
Fh made his suit and shirts with 2 tailors along suhkuvmit. we bought wedding gifts at chatuchat mkt, chinatown for seafood dinner and those pork floss tibits. eh, fyi, the one look like "dog shit" cost baht150 in MBK but its packed two layer, in chinatown it cost Baht 100 but with one layer. the other type of pork floss wrap in love letters, it will cost baht100 at both places. of cos further on must bargain lah..
We met our Thai friends for dinner at this Baiyoke Tower 2, cost 450 baht for international buffet at 78 floor, buy tickets (food + entry) at their 18th floor lobby. after dinner we proceed to 83/84 floor, see the whole city and enjoyed the breeze, we went up at nite, but my fh and i agree that daytime should be better cos at nite you can only see lightings, but daytime may be too hot lah. its very crowded at dinner time, if you want dinner there, make it earlier.
Another thing to share, we change currency only at BKK airport, rate is at 24.56. It will be abt the same rate in town. think the Siam commercial bank rate is better as compared to other banks you can find, you can check out the rate in singapore and compare.
the maps at the airport is very user friendly, it shows clearly ALL the tourism places. grab one when you got there! and throw away old maps! heehee