Ah yes something i know for a fact, cause i live there.
Walmart at US 395/ Topsy Ln has a few spots, turn toward the store, look to your right, and you'll see a area where you can park. Don't park in the store's lot, they like to run ya off. Plenty of fast food places
There are no truck stops from the CA/NV boarder on US 395. Have seen trucks use the chain on/0ff areas to take thier breaks. No truck parking in mty lots in Gardenerville/ Minden. You will get cited and towed.
As you come thru Minden/ Gardnerville,. you will see the Carson Valley Inn/ Casino, west side of the building theres room for about 3 trucks, provided the 4 wheelers have left. Not really a truck lot, but i used to park my truck there for two years, before i bought a house.