Dear Big bunny:
The Grammar Police have asked me to tell you that the use of "Dominican" with no noun is unacceptable. "Dominican" is an adjective and therefore must modify something...Dominican people, Dominican Republic. Get the idea?
Okay, that is settled.
Now, regarding a two or three month stay this winter. What a wonderful idea.
You do not really have to worry about over-staying your Tourist Card. The fines are very little. You can find a list of them elsewhere on this board.
Regarding where you want to go----well, this is a place with everything from dry deserts, to high mountains to lush tropical rain forests with beaches, rivers and nice cities thrown in the mix.
Perhaps you could start on the North Shore at a place like Cabarete or Sosúa and get a feel for what's up.....
And then venture on to different places.
Have fun.
HB