We are going to Gran Bahia Principe Bavaro. This will be our first time at an all inclusive, and we are rather green at the whole thing. How much money should we bring for tipping and how much do we give to the housekeeper and bartenders? Also, should we bring our own plastic glasses with us for drinks? I was told by a co worker not to drink from the glasses down there. We usually go to Maui, but the people I work with want me to branch out! Thanks.