I was thinking of doing a sneaky trip to BKK as I have read some great reports here and looking for a GFE there for a few days but been there many times before (though not for punting ) but prefer to go to an island like Karbi (haven't been before) for most of the time.  

To those experienced mongers out there, is it possible to get a nice girl for 4-5 days there?

I haven't never been to Krabi but I did a search on ISG and did not see many recent reports.  If you plan to spend any time in BKK, you could find a girl and take her to Krabi.   Kinda expensive as you would have to pay for her flight, fee for the 4-5 days and day to day cost.  

Other option is to skip Krabi and head to Phuket.  Plenty of options for girls in Patong but quality not as high as BKK (can also be pricier than BKK in my experience).  You can make day trips to Krabi as well from Phuket. This is the better option if you want a different girl each night.

I've brought a couple of gogo girls from BKK on trips to Phuket. One was just annoying and kept asking for money and gifts - could not get rid of her fast enough by the end of our 4 day trip.  The second was much nicer (she was also newer to the business and less jaded than the first).  We spent 4 days in Phuket and she was the essence of GFE.  We still keep in touch and although she has quit the business and moved back to her home region, she still comes to BKK to see me when I visit - no money asked for but I do give her some small gifts and some money before I head back home.  I like to bring her tiny bikinis to wear at the beach and snorkeling.  She is a bit shy and embarrassed to wear these in public, but she knows I like her in the bikinis so she goes along with a big smile.  Eventually, she likes the looks she gets and her confidence builds - always leads to a great night of sex afterwards.

If you do bring a girl, don't be cheap.  Buy her little gifts. Give her some spending money as well so she's notalways dependent on you for things.  And don't forget the itsy bitsy teeny weeny bikini.  Buy her clothes you wanna she her wear.  Strangely enough, although the girls work in the sex industry, they don't normally have "sexy" clothing aside from their work clothes (and these are not really appropriate out in public).  Get her some sexy but not too revealing clothes and you will both benefit.  

I guess I veered off the topic a bit, but hope my advice helps.

Great, just what I needed to know.  BKK is probably the option at this stage.  Will give it a whirl.

I did meet a girl in HK just recently which was great GFE and thought about meeting up with her but I think i can do a little better on the bar scene in BKK once I get there.