Yes the resort fee is sometimes not listed since you don't pay Priceline directly. It is due and payable to the Hotel on check-out. I don't see the 4.5 listing for 6/28 - 7/2. Did you follow the links all the way to the booking details? 95% of the time is is listed in the breakdown as Additional Mandatory Fee* and is based on the $30 pre-tax resort fee or $33.75 (fee+tax) per day.
Note: Priceline provides the following disclaimer that covers this:
The reservation holder must present a valid photo ID and credit card at check-in. The credit card is required for any additional hotel specific service fees or incidental charges or fees that may be charged by the hotel to the customer at checkout. These
charges may be mandatory (e.g., resort fees) or optional (parking, phone calls or minibar charges) and are not included in the room rate.
Dave
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