I switched to Maxxis after 3 GY Marithons failed on the same trip, 98 degree heat killed them. All three had a large bulge in the tread. I check my tire pressure at the start of each day I travel. I was lucky not to have a blowout.
Now is a great time to replace the valve stems, delete the rubber ones and get the STEEL valve stems. Steel is alot easier to check the air pressure on with out bending the stem over and maybe causing the leak that you are trying to avoid by checking the air pressure in the first place.
Balance the trailer tires, unless you only do very short trips with no highway travel.
2005 F150 XLT Supercab LB Heavy Payload 5.4, 4.10
2007 Jayco Jayflight 31BHDS
Back-up camera on the TT with infrared & microphone
Reese duel cam hitch, U-bolt style ($40 at a garage sale)
2 canoes, 3 kayaks, & camping dog (Tootsie)
Just to comment on the availability of Maxxis tires. The dealer locator on their website showed ONE store and a bunch of AAA places. I stopped at a place that is a Cooper dealer to look at the AT's. I told him I wish I could get the Maxxis from him too. He said he was NOT a Maxxis dealer but could get me ANY tire I wanted. He actually beat the "dealers" price.
Just saying, don't go just by the website dealer locator. Get out and beat the bushes. Most of these places all get their tires from the same distrubitors.
x2 on the Towmasters, keep them properly inflated and not overloaded. Be sure you get radial tires NOT bias-ply tires.
There is nothing wrong with Bias also long as you don't mix them with radials. They are prefered tire for tailers that see lots of offroad.
Bias will also stand up to twist much better than radails. The jack knifeing people do tring fit into tight spots twist the heck out of tires. One of the reason 5 wheels are hell on tires is because of this. I have seen peopele with the truck darn near right angle to the trailer and the inside tires are twist like crazy and sliding sidewise.