We ride most weather, I have a Dirt Bike and my daughters have dirt bikes also but we are only taking the RZR this trip. Thanks for all the info. It should be fun.
I ride all year around hot or cold so if it going to be a Hot that day I just get up a little earlier and ride it's only hot when you stop. The weather well be fine don't worry about that! I'm on two wheels there's a lot of trails out there!! You can also go from Jawbone to Dove Springs as well.
Normally would be pretty crowded on a big weekend but I don't know if many go Memorial, its usually too hot. Might get lucky this year. I think you're a SxS family so it should be lots of fun, not so much for us two wheeled folks, most all fireroads.
Have a great time there is a lot of good riding out there. Just be cautious as weather can easily reach into the high 90's by Memorial weekend. Take lots of water. Also snake season so keep your eyes open.