Lovelmr,
The places you mentioned that you will be visiting are quite safe and many tourists frequent them year round. The places that have had the most problems over the past few years are the four southern most provinces – which are: Yala, Pattani, Narathiwas and part of Sonkla…and even then its not like all of these provinces are unsafe.
You will find the Thai people very friendly and helpful – you can check out additional info on my Bangkok article here: http://www.davestravelcorner.com/articles/bangkok/index.htm
…and if you have other questions about what to see, travel in Thailand or anything in general about Thailand let me know.
Regards,
~ Dave