engine cooling with a heavy load?

[Flexiheep]

Question for the folks who are running a turned up pump etc and pulling the heavier/less aerodynamic loads. Are you doing anything special to keep the engine temp under control?
A little background for my question is that my wife and I just bought a 30 ft TT that sits almost 12 feet tall, and about 10K when loaded. I am happy with my power level, but a recent trip where the air temps were around 80 degrees showed that the water temp climbs rapidly. Under load (3rd gear, 2300 rpm, 1250 pyro, and 230 tranny) It never gets to the top of the last third, but it gets close.
Again I am happy with the power and speeds I can run, but would like to have it run cool, even in 100 plus heat with the A/C on and the family inside..... Maybe I am asking too much

With the guys making big power here I figure someone has played with cooling before and has a couple ideas. I am planning to ditch the oil/water tranny cooler to lessen that load (twin underbed fan assist coolers planned). I have seen a passing comment about a 2nd gen radiator (Napa online shows it is a foot wider) but I haven't looked to see if it is reasonable to think I could mount one......

Anyone have experience? My goal is to put 200-230 hp to the road and not have to worry about cooling it even in the summer.....