i have been thinking about getting kayaks for myself and my boy. my boy is 11 5'5" and about 130 lbs, and pretty agile. i on the other hand go about 6'4" and 250 lbs and have a bad knee. how hard/easy are these things mount and balance. i read the posts on this forum and they seem to be the cats A@# for stream fishing. i thought about using our 12" john boat, but i think i would be more hassle then help. any info would be appreciated.