You nailed it. I used a Sea to Summit poncho that doubled at a tarp and at times for a dry spot to have picnics on, and a 48 inch 8 ounce Therm-A-Rest NeoAir XLite air mattress and a 8 ounce bivy that's no longer sold made by Katabaticgear and their quilt. With hiking poles it all worked out great when I had to use it, which was only a handful of times. Carry at least 4 tent pegs; locals don't like it when you cut branches to use for that. Albergues are affordable along the Norte and Primitivo. Be aware there are longish distances between albergues on the Primitivo plus food supply stores are almost a dinosaur in villages. Many times the stores are closed on Sundays, Mondays, Wednesdays etc without any rhyme or reason and or they close for a few hours during the day when by chance you happen to arrive in the village. So, load up emergency food for at least 5 meals when you finally do get a chance to get provisions, likewise carry one and a half liters of water with you at all times. At a few very small hotels, only the guests were allowed to eat because that's all the hotel could afford to stock, so I went to sleep hungry a few nights. That was my experience along the Norte and Primitivo. BTW it's illegal to sleep on beaches, and there are a lot of those along the Norte. Go to a largish Spanish hardware store at the beginning of the Norte, where they sell safe insecticides, I sprayed the interior of my pack, quilt and basically anything that I didn't eat. Their insecticides last the duration of your Camino. Pay attention to the products, what I used was bed and furniture safe. Some insects can make you really sick, so use what the locals use because that's what works best in Spain. Don't worry about the insecticide chemicals, prevention is far safer than the treatment products used to recover from bug infestations. One more thing, set your kit up and sleep in/ under it at least two nights before you leave, that way you can fine tune what is best for you and you'll be quicker to set up. You might even figure some way to shed a little pack weight by doing so.Pack your bags in such a way you don't have to dump all of it to find the essentials of your sleep kit. There are lots of YouTube tutorials on packing and poncho set ups. You will never, ever regret your Camino. I promise you.