Additional ideas for beach vacations:
*Clam digging from fresh water
*Oyster digging & kelp picking
*Clams and Oysters could be harvested for meat & pearls
*Clams & oysters could be placed in aquariums back home for harvest or released in salt & fresh waters back home to seed the lots for later harvest
*Exotic fish
*Tropical seeds that can be planted in green houses and/or gardens
*New types of flowers and fruit
*Jet ski & parasailing rides
*Park with waterslides and pools
*CAS items would include coconut bra & seashell bra & maybe grass skirts (if they don't already exist for the game)
*Souvenirs could include shot glasses, little drink umbrellas, and latte stones (miniature versions of supports for buildings from Guam)
*Warm water scuba diving which allows Sims to search underwater for sunken treasure and rare seashells.
*Underwater caves & sunken ships to explore
*Befriend dolphins & play with them-- if they like the Sim enough they might take them for a ride
It would actually be great if kelp growing and clam/oyster digging could be added to regular neighborhoods as well.
Additional ideas for winter vacations:
*Igloos that are sort of like tents (they can range from tiny single occupant ones to group igloos)
*Cabin with cozy fireplaces that Sims gather around and roast marshmallows
*Ice fishing
*Sleds & sledding (is that what you meant by sleighs?)
*Firewood gathering with the chance to find something interesting-- either good or bad.
*Cold water scuba diving (requires special protective diving suits & masks)
*Find lost artifacts in the snow
*Collect seeds / fruit from winter plants that can be planted in gardens or special greenhouses that are kept cold with thermostats
*Souvenirs include steins, mugs, winter trophies
*Sims can play pranks on Yeti in the spirit of the Jack Links Sasquatch
Additional ideas for Creative Hobbies:
*Sheep, llamas, and alpacas that can be shaved to harvest wool
*Sims with dogs & cats can collect fur that can be used to make yarn/thread (Believe it or not, there are people who do this in real life)
*Grow cotton for sewing material
*Spinning wheels and looms for sewing / weaving (weaving will yield things like decorative rugs & tapestries)
*Basket weaving from grass & other plants
*Collect materials from fruits & shells to make dyes for clothes
*Collect/harvest sand & clay from various places--each having different properties/colors
*Glass blowing (using sand that is heated or Sims can buy sand)
*Painting pottery, rocks, eggs etc (perhaps paintings could be made with lacquer, eggshell, and/or mother-of-pearl from shells)
*Whittling / wood carving
*Jewelry making-- from manipulating metals in to jewelry to cutting gems that are found. Pearls & gems can be set in metal settings.
*Sims can find and read books/scrolls on various new types of crafting to learn how to make new things and boost their creative/sewing/etc skill