Hi bobbie - welcome to Debbie’s
How fun to be taking your first real family vacation! The Bavaro Princess is a very nice resort - I was there in 2002 and loved it then, but they have since done some major renovations and the place is even better now.
You mention that you’re taking 4 kids - how old? I ask because this is a very large resort - the walking may be a tad tough on little feet. Be sure to take advantage of the shuttle that runs throughout the property…it’s excellent, and runs constantly.
ANYWAY, on to your questions…
Yes, the resort does provide beach towels. You’ll be given a towel card upon check-in - one per person - which you can exchange for a fresh towel (1 per card) whenever you need one. Just be sure that you do not lose any of your cards or towels as you will be billed for them upon checkout.
Bottled water is available everywhere…in your room fridge, at the bars, etc. You won’t have any trouble finding any. Tap water is not potable, so do not use it for brusing your teeth - stick to the bottled water.
How much money you need depends on a lot of different variables: will you be doing any tours or sight-seeing? Most tours are in the ballpark of $80USD per adult. Do you plan on doing any shopping? There’s really not a whole lot to buy…coffee, t-shirts, paintings, alcohol…all of which are relatively cheap (or as our Dominican friends say, “cheapy cheapy” ;D).
We usually bring about $100USD for tipping for a one-week trip - but that depends entirely on personal preference. Some tip, some don’t.
You’ve found the right place to ask all of your DR questions. There are quite a few people on the forums who have been to the Bavaro Princess more recently than I, so plenty of folks around to answer any questions that may pop up