Thailand visit

My daughter, Louisa, from Melb. was planning to go to Thailand on 29/9 for a month with 2 friends.  Now the friends have back out and she has asked me to go with her.  I would appreciate some advice from those who have travelled to Thailand, e.g. where to go, hotel accommodation, etc.  I usually travelled with tour groups, and recently went to Krabi with some friends.    Any advice would be truly appreciated.  Many tks.

Dora