Is there any places which will be of interest which you will have to pay prior to going in thailand?

Hey, are there any projects or events which you will have to pre book in advanced which will be deferently be worth a try, like staying with a TRATIONAL family, take part in a interesting project, i will be going all around thailand mainly around bangkok way and chiang mai area and around there, are there any places around them or anywhere else, i will be staying for a month in thailand so maybe project or evetns which will be a week, thank you