Luggage and bags:
As far as we have 4 seasons, you should take proper stuff.
Winter-can be chilly, Spring-average temp. 20 degrees Celsius, Summer-can be really hot but not extreamly humid, Autumn-same as spring
Clothing/Shoes/Weather Gear: Nice pair of shoes for going out
Flip flops for sightseeing and walking, for beach
Toiletries and Medical Supplies: Bandages, patches...all reachable in farmacies.
Mosquito repellents only if you go to a summer cottages near the river.
Photo Equipment: Internet cafes are all over the place. You can easily burn a cd.