Rules for the sweepstakes:

http://www.marriott.com/File_Blocks/...eep_rules.html

Also, alternate method of entry if not staying at a Marriott (snail mail).

"To receive additional entries without making a stay, you must first register for the Offer to receive a registration entry. Then, hand print your name, Marriott Rewards number, address, city, state/province, zip/postal code, country, telephone number, date of birth, and email address on a plain 3" x 5" piece of paper, insert it into an envelope, affix postage and mail it to: Marriott Rewards Global Summer Sweepstakes, P.O. Box 7650 Melville, NY 11775-7650 USA, to receive one (1) additional entry into the Sweepstakes. Entries must be hand-addressed, postmarked by September 5, 2016 and received by September 15, 2016 to be eligible for the Sweepstakes random drawing. Mechanically reproduced or photocopied mailed entries are automatically void. Incomplete entries are void. Limit one (1) mailed entry per envelope. Mailed entries received from anyone who has not registered for the Offer are void.

Limit one (1) additional entry (via stay or mail-in) per person/Marriott Rewards account per day for a maximum of one hundred four (104) additional entries per person/Marriott Rewards account, regardless of method of entry. No information regarding entries, other than as otherwise set forth in these Official Rules, will be disclosed. Entries must be received by 11:59 p.m. ET on September 5, 2016 to be included in the random drawing. Mailed Entries must be postmarked by September 5, 2016 and received by September 15, 2016 to be included in the random drawing. Use of any automated or computer system to participate is prohibited and will result in disqualification. Normal Internet access and usage charges imposed by your online service may apply. If entering via mobile device, normal phone/data and usage charges imposed by your phone service may apply.