What percent of the time do you leave your TC on your truck?

Side question for those who use truck for camping only, how you deal with registration and insurance?
Even with my good records and liability only, keeping truck registered in Las Vegas cost about $1400 annually.
Good part, Clark County allows for plate surrender and they give me credit for unused fee. Still if I don't use credit in about 6 months, I am at lost, but at least insurance is not playing games with me.