If you can carry $2 worth of sugar one way, you can
do it also the other way.
Otc medicines are not necessarily cheaper here (as a rule of
thumb: if your one cost less than 20¢ each pill get always from
home, also is better you get the standard product since other ones
coud have different dosage.
About bug spray: befor getting a bulk bottle, verify that there are
bugs where you are going!
About Spices: Get from home IF YOU WANT TO EAT AS IN
YOUR HOME, but if you want to dine according the local habits
buy spices and food there!
About other consumable stuff (such sugar, paper, oil, beer, wine)
take whith you one day worth of that, just not to be forced to rush
for a supermarket as soon you will ariive.