30th Birthday Scavenger Hunt

Hello, I am planning a Scavenger Hunt Bar Crawl for my Husband`s 30th birthday, my questions are if anyone has any ideas for items, please email me, I am trying to do items in 30`s, Example (30 drink umbrellas, or match books from different bars) Another question is I was thinking of not having teams but have all of us (a group of 30) help my husband find the items. Is this a good idea b/c I am sure noone wants to get split up. Also I am having everyone wear Sports attire (my husbands favorite) or should I make T-shirts? Please email me at bracci48@yahoo.com with any suggestions or clues!! Thanks so much!