About cookware - most cookware lasts plenty long, whether good quality or not - mine is 11 years old and most was purchased right here ------ just wash it and put it away. Selection is erratic and sometimes the most basic thing is just not for sale for months ------ I'd probably buy and bring a set of cookware just to keep sane.
How to get the "Stuff" home to the island from BC - I hire a ponga for the day - either fly over to BC or ride along in the boat depending on time and other circumstances. In BC, hire a large cab (van) by the hour and do serious shopping. When the van is full, we go to the boat and dump the load, repeating that until we run out of time, energy and/or money. Then I get a nice cold beverage & a meat pie, hop in the boat and ride home to AC - unload at the house and viola.
If you buy large items like mattresses, couches, etc. then have the vendor put them on a barge bound for San Pedro.
Skin-care items - I find them to be available, natural and very affordable ------- look for the local products - soaps, potions, lotions ----- coconut oil ----- Mayan Secrets products look pricey, but a little bit of the product goes a long way and in the end they are quite reasonable. Particularly great - "Rainforest Refreshner" / soaps - clay, seaweed, coconut / facial toner / cahune oil is super-effective for removing waterproof mascara and does a wonderful thing for your skin and lashes in the process.
Linda and Kelley McDermott are planning to open a bed and bath / housewares shop in SP soon. That could solve some of our bedding issues.
As for small appliances ----- by the time you buy a blender in the US, ship it & pay duty - you will most likely spend more than if you bought it in Belize City. Prices in the shops here are sometimes a bit more than in the US - but the stuff is HERE and that means a lot less hassle and a certain overall savings to you.