Can I keep my tundra and tow my boat if add airbags/suspension?

Recently bought boat that ways up to 10,500 including trailer and fill tanks. Could get down to 9,500 with empty/lower fluids.
I don’t tow very often, mainly doing one tow from Santa Barbara to Lake Tahoe (9-10 hours up to 7,000 elevation) once a year, and then just occasional around town tows. Boat is in a slip.
If I add airbags, and better suspension, would it be enough power to go up to that elevation without overloading my Tundra? I’ve heard mixed stories about needing transmission cooler, etc.
I’m looking at Chevy 2500diesel.
I don’t want to do anything to Tundra if it’s just not going to be enough or stressful wondering if will damage it
i don’t want to be barely moving or maxing out the whole time

 

I have a 2019 SR5 tundra with a TRD and my older one 2016 Limited TRD, both are 4 x 4‘s. I am selling the 2016, and planning on keeping 2019. When I drive the 16, it feels different to me better suspension feeling. Are they the same or is the limited TRD different? It definitely feels like the newer one is spongier.

 

I tow a boat half that weight with my Tundra. For 10k lbs, I’d go w/ a 3/4 ton truck, for sure. I actually think the 5.7 is capable of pulling it. But I’d be more worried about stopping it. My buddy tows his Nautique with a 2500. There’s a big difference. His boat is close to 1k heavier than mine, and on his if you didn’t know it was back there, it feels like he isn’t even towing anything. Whereas mine, there’s a very noticeable difference in the ride, particularly when braking. And, even though I think the 5.7 would be enough, the diesel would easily be better. I just think the truck weight is more important in this scenario. Just my $.02