And since this is kayak camping... I'm building to a 4 day civilized adventure, about 100km along a lovely, inhabited river stretch. Lots of places to stop and wander, some museums to see, cafes, etc. But in between the villages there should be enough space to camp.
I used to use the "lightweight" silpoly bags, but they all got holes from basic wear and tear. A couple years back I switched to the thicker PVC style bags and have been super happy. I have several of these in different styles:
Piscifun Waterproof Dry Bag... https://www.amazon.com/dp/B07JY8LQ66
For a 2p tent you could probably squeeze everything minutes your poles in a 10 liter, but if you want to include your poles, you're going to want to measure their length and match the bag size. Personally, I put the tent, rain fly and ground cover in a dry bag and let the poles get wet. The 40 liter could probably hold nearly everything you'd want to bring, especially if you have a smaller camping pillow and smaller sized sleeping pad. Size wise, 20 liters is a little smaller than a 5 gallon bucket.
Basically you pack for kayak camping like you would for backpacking. I tend to keep mine fairly essential. I have a 2 person tend that weighs in at a little over 2 pounds, a sleeping bag rated for 50° that weighs in at 1.5 pounds. A dry bag with 1 or 2 changes of clothes (depending on the length of the trip) usually about 5 pounds. 1 dry bag containing a roll of toilet paper, baby wipes, 2 Bic lighters, a first aid kit, battery pack, 2 led head lamps, 2 mess kits, and a water purification pump weighing in at around 5 pounds. I bring along a camelback carrying 3 liters of water, a kukri knife (used for many things including replacing the need for a hatchet or axe for firewood gathering), I usually bring a jet boil for heating water for dehydrated meal packets for breakfast and is the Java kit so I can have coffee in the mornings, it’s less than a pound. I have a portable grill rack for cooking over coals I bought off of Amazon less than a pound. And a JBL charge 4 Bluetooth speaker that is a luxury at camp at about 3 pounds. Usually I have a small cooler (big enough to carry food for 2 people for 2 day and a freeze block in it) for storing food. An E-tool at about 3 pounds, PFD, paddle, the only other thing I regularly bring is a Glock 19.
I live in North Central USA - Duluth, Minnesota to be exact. We have the BWCA - check it out - and Lake Superior. Kayak/Canoe camping is all that I do.
Because we portage from place to place I have learned a few things about weight management while keeping the trip fun -having a few beers/whisky in my case.
For cooking - try the MSR Pocket Rocket and a pot for cooking or boiling water. Relying solely on electricity and a crockpot could be a problem. Use a table like this - https://www.amazon.com/Naturehike-Folding-Camping-Table-Lightweight/dp/B088NBRTSH/ref=sr_1_35?crid=22Q9JXSLO3VYD&dchild=1&keywords=backpacking+table+ultralight&qid=1617202892&sprefix=backpacking+table%2Caps%2C227&sr=8-35
Your tent setup looked good. During my kayak camping adventures I will go between 30 - 60 miles in a week through several lakes. No motorized help - just paddling. Keep up the ingenuity my friend!