Resort Fees on Reward Rooms

I'm visiting over Christmas & have never used any rewards before. Since some rewards I want require a room stay, I thought I might use some of myVegas points to book one night. Any advice? Thanks!
We used a reward on a Mandalay Bay room Friday November 7th. Check in was very easy and simple. Checked in around 2 pm with no problem but we did pay a resort fee.
Thanks, I did find that on the rewards info-second page.