While I like the design of your boat, I don't see what it has to do with exploring anything by boat since I appears to have about a 2 hour voyage endurance as shown. I've done quite a bit of minimalist coastal exploring and the departure cargo weight is usually around 700 - 800 pounds for a typical 2 person trip.
Propulsion - You absolutely need a little outboard - it is just plain stupid not to have one. People need to be able to keep a schedule and arrive at their destination on time each night. This is crucial. The only way a small boat can do that is with a little outboard. So a 2 hp outboard and 12 gallons of gas gives you the ability to motor at 3 knots or so for 100 hours or more. This is what it takes just to begin, because pulling permits for camping, even if you book a year in advance, is fraught with challenges, like a hurricane took three of your sites away over the winter, or the bloody clerk left one of your stopovers off the permit and now you have to do a 50 mile day in the middle or not go. Or prudence dictates starting a day later due to weather and you have to do 40 miles on your first day. The reason I was able to do so many trips is that I was at least able to begin every one of them. Call it 150 pounds with the engine mount.
Water. My typical water load was 4 x 7 gal hard sided jugs + 4 x 5 gal collapsible jugs = 48 gallons of water. Call it 410 pounds with the jugs.
Food - about 45 pounds for 2 people for 2 weeks. Mostly dry/dehydrated, but some cans and jars. 2 backpacker stoves, a grill, pots and pans, and 2 gals of whitegas. All stored in steelclad Coleman coolers (not bear-proof, but you'll sure hear them going to work on them). Call it 75 pounds.
Camping gear. Usually an expedition-rated 3 man tent plus jungle hammocks or bivys and the usual kit and caboodle. 40 pounds for 2.
Electrical - boat should be night capable with a decent nav system and possibly an autostick. It needs a battery, solar panel or small gen set, small inverter, laptop, gps dongle or portable gps, electocompass, mag compass, Q-beam, vhf radio and autostick. If solar, you'd want about 200 Watt rated. There are also a couple tiny outboards that can generate a little juice.
Ground tackle and mooring gear. I carried two anchors, a sounding lead and logline. I carried about 1000 feet of 3/8 hard nylon for hauling the boat. Look up "flip flop winch" for how to drag your boat over problem areas. You'll need a saw to make the winch and cut rollers. I only had to do this three times in 25 years, but I was the only camping party that still had a boat after 2 of those times. You need the ability to lift your entire boat up vertically as well. This saved my hide once. Always carry a pair of handy-billys made up. Basic tools and hardware to patch boat - like a carpet square and a quart of epoxy, are important. My first aid kit weighs about 20 pounds.
Hobbies? ham radios, camera gear, telescopes, binoculars, artist pallet, books, guide books, fishing gear, crab pots, snares, guns, snorkle gear, pets. My travelling partner tended to abuse this part of the weight budget.
If your going to head out there any do some exploring, don't cut things so fine you can't render aide to others. You should always keep enough reserves to help out others, including towing bigger boats and helping out stranded parties. Also consider that people are getting bigger. I've had an invited guest show up with another guest that weighed 350 pounds. No problem, pile in and let's get going.
So I think you need to look at where all this stuff is going to go. My dinghy wasn't slow. She ended up as a pot tender with a 25 hp Yamaha on the back after 25 years as a sailing dinghy. I built her specifically as a camp cruiser for the Everglades. It's predecessor did weigh about 130 pounds and I used it until I was about 25. But it just was too small and a bit fragile. It was a 14' 50's Mac Dinghy made of 4mm ply and red paint. Some photo's of it @
looking for the right boat https://www.boatdesign.net/threads/looking-for-the-right-boat.54096/#post-749289. My next one was 16', and a bit heavier.
