2 stroke for portability if planning on taking it on and off. Way lighter for the power. Go 10 or 15. 8 will plane my 3.1 with 2 up but 10 would be better, 15 better again. I'll probably swap to a Suzi 15 in the future for more safety margin. I reckon go 3.4 on the boat if you can too.
Just be careful and punctures can be avoided. Use circle hooks, spear gaff or net fish, keep them away from the pontoons. Punctures don't seem to be catastrophic anyway. Other people being spastic are the biggest puncture risk, train any passengers well
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