I've been building and modifying a set of hakas for the last 2 months and I'm happy with the way they came out. I often used tramps in the past but these hakas feel more practical in my opinion.
I just returned from a 8 day trip in the Everglades and they worked great for the expedition. I used them to hold gear as well as hike out on during windy conditions. Plus they were nice to get out on just to stretch the back or a change of pace from sitting in the wet hobie seat.
I moved the gps holder a few times since these pictures and still have minor adjustments to make. The hakas were made from 3" furring strips which I then sanded. Inexpensive pine but the only difference between the expensive pine was the finish which I was able to take care of. The expensive part of the project was stainless bolts and the sikkens cetol marine (natural teak) varnish.
There was too much flex in my original project so I used some scrap aluminum square tube I had on the bottom which worked very well.
If you take both hakas and put them on one side of the boat, I believe it's possible to put a free standing side entry tent. If I do the Watertribe Everglades Challenge, I will look harder into getting that option to work. Each Haka is 14 pounds and 7' by 13". Putting 2 hakas on one side give you a platform 7' by 27". By adding a couple extendable aluminum pins in the corners, I think this could accommodate a tent like the MSR hubba 1 person tent. Not 100% on the logistics though.
After sailing 8 days with them in a heavily loaded AI, the boat performed great. So a big thanks to NoHuHu for the inspiration to do this project !