Welcome new members!
Orange Life Snake
Hrmm.... You could do guess the pet type of games. Where just a little piece of the pet is shown while the rest of it is buried under items. Each member is limited to one guess per contest.
You already have ideas for raffles which are good.
The lights on lights off games from Halloween and Christmas could be a fun thing. But more like "Find the Easter Eggs in the banner, unscramble the letters and win." Sorry completely rattling off a random idea.
Again I would put in a limit of the number of times a member can guess or make attempts on each contest.