We are two families with a seven, six and four year old traveling to Zion in late July. Our plan is one night in vegas (driving from LA) and then two nights camping in Zion (already have a reservation) and two nights in a vrbo. It sounds like it will be hot in July. If we hike in the am what can we do to stay cool during the day? I'm assuming it won't be super pleasant to sit around our camp until evening. And what city should we vrbo in? We were thinking st George so we could also do Bryce but maybe it's better to stay closer to Zion if there will still be a lot we want to do. Thanks!