Goodyear wrangler duratrac 265/70/r17 115s vs 121q

So I’m looking at the Goodyear wrangler duratrac 265/70/r17 as they have a great sale going on at my local store but I’m unsure to go with the 115s or 121q. Only things I really tow are a seadoo or camper. Take my parents quad in the bed from time to time and do a bit of off-roading but nothing intense. I do drive to my cabin a nice bit which is a dirt road. I’m leaving towards the s more due to the weight. I don’t feel like I need a 10pm tire but I could be wrong so I’d like some feedback/advice!