There are many beautiful areas that cater to tourists with beautiful beaches. You don't have to worry abuut going out at night at all. I have roamed the streets in the middle of the night and the biggest problem I have had is saying NO to the girls that want me. (actually my money

)
Check out Cabarete, Sosua to the east and Costambar and Confressi to the west. All withing a half hour drive or closer.
I love this area and I have been 6x in the last year. I would have been more often but HAD to go to Mexico when the plane fare was out of this world to the DR.
Keep in touch and lets touch base closer to Christmas. I am leaving on a 6:45 am flight on Christmas day and returning on the 6th of January.
Regards