The plans I have looked at are the Selway-Fisher motor canoe, Ross Lilliston Fleet, and countless others. Good luck in your search and I am in Fairbanks if you want to look at some potential boats. If stability is the only problem and the cheap canoe is big enough, why not just build a stabilizer or two for it? You can get epoxy at West Marine in Anchorage or at Plaschem located in either Wasilla or Houston. If management will not approve a multi hull I think you're on the right track with the motor canoe.
Long and narrow to make lifting as easy as possible but these are not ultralights and total weight starts to become a problem for cartopping.
From the reading and videos I've come across, some variety of stitch and glue dory or skiff would suite my needs best, but I wish to kindly request more expert advice based on my needs and planned usage. I enjoyed this detailed video about the Devlin Design Polliwog, but that particular boat seems better applied for lakes. I am not sure about the most suitable length because of the trade-off between stability and weight.
Drill, circular saw, reciprocating saw, sand paper, chisels, hammers, a few hand saws, screw drivers, screws, nails, pliers, metal wire, vacuum, T-squares, measuring tapes, safety equipment, etc. Although my carpentry skills aren't extensive, I do have a considerable drafting background. I have a station wagon and an uneven patio space to work with, sadly no beautiful garage, workbench, and truck.
I've covered as much relevant information as possible, thanks very much for any advice, suggestions, and online reading material.
I will only say that your tool list is pretty good, add a block plane and a couple of good chisels, along with the means to sharpen them.
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I build the Cheap Canoe this spring and it was a great experience but was to tippy for use with my two children under 6. I have been able to source BS1088 plywood locally, but still have to find who sells epoxy resin locally or the best place to order it from that ships to Alaska. The candlefish 13 looks good but concerned about the amount of material required and the method of build. I have the Scott Bushman model and as stable as it is, I find it pretty narrow for operating the motor. Sadly, geography and lack of guidance in this field prevented much boating experience beyond a few dozen hours total.
I feel that ordering an assemble-yourself boat is curtailing the challenge of building from scratch, as well as increasing cost. This makes me unsure if building with a jig and plum bob is worth the attempt unless I compensate for terrain. Build from plans, I would say their lapstich-boats could match your ambitions and building resources.
Your problem is more of how much boat you would need to go off shore with the capabilites of a kayak which is designed for open water. Even if you don't like anything they offer you can get a quick lesson in the capabilites of various types of hulls, how much and what kind of material is required and what kind of weight you can expect. A light boat will be much easier to cartop, as well, which would be an advantage in your situation. The original boats were used for decades on this coast for handlining salmon in Georgia Straight. This winter I would like to build somthing that is cartop able, a tow vehicle is not in the budget, will fit on adult along with two children. I know all boats are compromises, but the project will give me somthing to work on when winter hits with the little ones. Spurred by my father's recent purchase of a kayak, I am feeling rather set on building some variety of row boat so we can paddle about together.

My budget will accommodate a plane or two, multiple clamps, and an orbital sander, although I don't know if I need any more tools. My car doesn't have a hitch, and my driveway is extremely steep, so a full trailer won't happen. A flat-bottomed rowing skiff of about 10-12 feet will work and, if built with BS1088 Okuome marine ply, be lighter than any metal or plastic counterpart. It would be used on the local lakes and rivers, and maybe in a pinch on saltwater or larger alaska rivers. If you can find something in wood that approximates that hull, it would be very stable for your family. Easily car-toppable it would be fine for most of the smaller interior lakes and would be fine on the Chena, as well. There are a lot of boats that would fill your requirements, how long is your father's kayak? You'll want a waterline length close to, or surpassing that if you want to keep up with him.
So the biggest danger on the rivers, besides the snags, are the jet boats that are going really fast. Altho small, I would think it would b well within your skill set and be big enough for an adult and two small kids. The plans are free and while you save and plan for a larger boat for the future, you can be using this one.

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