I just looked at a satellite view of Bayou Vista, Texas on Google maps. You have a street in front of every house for cars, and a canal behind every house for boats? That is COOL.
I don't envy the air quality where you live, but I'd love to have a boat in the backyard.
In that sandy soil, big, "balloony" tires will keep you from rutting the yard, but will still be a PITA to move. I camp on the Beach on Bolivar peninsula on a regular basis. Even lawns down there can be soft.
I always bring boards to level my camper, even though it doesn't weigh much. Have you thought about ripping some 4X8 plywood into strips to roll your smoker across the yard?