It starts to get hot in early June, which is when we are in the Grapevine area. Some of the Vineyards sites have trees for shade, but many do not. What they all have, however, is awesome access to the lake, amazing family-friendly amenities, and a helpful park staff. We were initially assigned a site that wasn't level enough to keep all wheels on the ground, so they relocated us. (That spot probably is fine for a travel trailer or 5th wheel.) The lake views are amazing. We loved the Friday night fireworks show, but slept-in Sunday morning and missed the free coffee and donuts.