We initially bought an Old Town Discover 169, which is pretty big and heavy. We fitted one of the apache seats across the middle for 2 wee boys.
However, the boys have grown, and additional loads mean that we need more flexible capacity. We moved to two Venture Ranger 16s. We have still fitted centre(ish) seats allowing solo paddling, or one adult in the centre and a press-ganged recruit at the bow and stern.
This weekend we did an overnight trip from Aberfeldy to Dunkeld on the Tay. We needed the space in 2 boats for 4 people and all the gear.
There is a thread somewhere about carrying canoes on vehicles… Enjoy!