For my first Camino, I used a combination of a friend's old smart phone and my iPad Mini as a camera. It was a good combo, great resolution, though I'll just be using the iPad the second time around even if it's a little harder to pull out.
Shipping from Spain is expensive. Most people I met who planned to ship things back and forth as needed ended up just carrying everything or leaving things behind as needed. Honestly, given the price of shipping, I'd pack minimally and if you needed something, just buy it in Pamplona, Burgos, etc.
There are plenty of packing lists on this forum, but as one lady to another I'll tell you what I brought for clothing. I had a quarter the amount of clothing as everyone else and had a versatile enough wardrobe for hiking, church, and the occasional nice restaurant. Everything was synthetic and quick drying, a must. (IMO, there's nothing worse than starting a day in wet clothes or with wet clothes pinned to your pack.) Add to the below a sm. travel towel, running shoes (I hate hiking boots), hiking sandals, iPad, sleeping bag, and some toiletries, everything I took to Spain with me weighed about 6.5 lbs. My travel pack for SJPP to SdC looked like most people's day packs. There were far too many people carrying packs the size of small children who would come in at the end of the day with back troubles, stiff hips, etc.
- bottoms: 1 pair water resistant hiking pants that converted into shorts; 1 knee length skirt, 1 travel dress
- Tops: 2 tank tops, 1 button up shirt (short sleeve)
- Outerwear: 1 rain shell, 1 fleece
- Other: 1 over-sized shemagh for use as scarf or sm. blanket, socks, gloves, underwear, etc
The only thing I wish I had brought was a pair of running tights to wear under my hiking pants during the handful of cold days, would have been great for Day 1. Ended up buying a pair for the Galicia portion of the trip.