Absolutely a Necessity!
I, too, carry one with me for all travels, with or without the trailer. One can never quite guarantee that the tire pressure in the spare will be right when you need it! I purchased on at Wal-Mart for about $50 which can fill a tire in between 3-5 minutes. It's a sound investment. Also make certain to have a high quality pressure gauge as well.
Created and defined by God, enjoying hiking through and camping in His gloriously designed earth and remembering that life is filled with opportunities for spiritual growth.
2004 Jeep Wrangler Unlimited