Alex, I've only seen pictures of one 268 equipped with davits and an inflatable. I have a cheaper West Marine roll up 8' 6" inflatable and a 6 hp Merc. I pull it up on the swim platform and use a ratchet strap from one rear cleat around the dinghy through the front handle and to the other cleat. Yes it is in the way at times, especially when docking and getting off the boat. It does limit your view to the rear especially when sitting in the rear seats. I have had a wave or boat wake hit the back end of the tube and move the dinghy around a bit on the swim platform, but I have not lost it. You can see in the pictures that the dinghy is pulled back a little to allow us to get off and on the boat. We trailer the Vista and typically deflate the dinghy and put in the bag when we are done with it for the week. I put a mounting base for the grill on the left rear corner of the swim platform. I need to launch the dinghy to use the BBQ grill or put the ladder down. My dinghy with the motor weighs a little under 100 pounds. I can pull it up on the swim platform by myself, but it takes some effort.
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If you do davits, be sure to mount the dinghy at least as high as the swim platform, or find a way to support the dinghy in a more horizontal position. There are times when the swim platform and dinghy may catch a little water getting on or coming off plane. This may possibly affect performance getting on plane. You will want to give some thought to davit location and will probably need to launch the dinghy to put the swim ladder down.
Any way you look at it though, its still worth having the dinghy along to go play with.