first timer

Both are decent brands with a good sized following. Since your in Utah think about where you want to camp, if in RV parks with hookups most atrailers are fine and are set up for that. If you plan on a lot of dry camping/boondocking, with no hookups, pay close attention to tank sizes, water storage, especially waste becomes your biggest issue. after power.
WDH with anti-sway is largely a given anymore, Solar can cover most power needs other than AC so long as you are frugal with TV and lights.