Sleeping in a truck, or in a hammock hmmmmm? That is a no brainer. Looks good, and as long as your warm, no worries. Have fun, and try new ways, thats how you know what works best.
Psalm 19:1-3 "The heavens declare the glory of God; and the firmament sheweth his handywork. Day unto day uttereth speech, and night unto night sheweth knowledge. There is no speech nor language, where their voice is not heard."