Changing tire load range tires for ALASKA TRIP

:) Hi, we went to Alaska with our old tires and replaced two seven year old trailer tires as needed and replaced all of the tow vehicle tires on our way home. Depending on road conditions when you go, we drove many miles on gravel and it wears your tires out fast. My opinion, but I didn't want to destroy brand new tires on this trip so I let the gravel eat up my old tires. I'm OK with doing that, but some people aren't.