From the terms and conditions:
Hotel Reward Stays apply to full Point redemptions or Point redemptions combined with money. Redemption stays can be used for Standard Rooms or Premium Rooms; both Reward types are for double occupancy room rate. Additional occupants, age 19 and above, are subject to the standard extra person charges. Any tax liability incurred (if any) in connection with the receipt and/or use of Hilton Honors Rewards, including, but not limited to, local or city occupancy taxes, international departure tax, customs fees, airport surcharges, non-resident tourism fees or individual income tax is the sole responsibility of the user. Incidental charges are the responsibility of the user. At hotels with resort fees, members on reward stays booked using all Points, or using a Promotional free night reward (e.g., issued by credit card partners, etc.) will not pay resort fees.
As stated by
:D! ! some properties won't care others might.
Also see:
Higher point redemption rates for more people?