I purchased Trojan T-125's for the front of my 27 ft TT. I had the trailer for 10 years and sold it with those batteries. When we bought our new to us TT it wasn't even a thought to do it again. You get what you pay for. Trojans are designed for industrial use. The other key is to not allow them to discharge below 50% and pay attention to the fluid level. Every time they deep discharge and you charge them up, you are boiling the electrolyte so you will always need to add some more distilled water. Last a smart charger that varies the voltage and applies a stir charge 14.4 volts keeps the plates in good shape. I bough the charge wizard and plugged it into my dumb house charger to make it smart.
Happy Trails!