I10 vs I40 Coast-to-Coast

ependydad wrote:
You can overnight at Sonoma Caverns in Texas and take in the Caverns without really messing up travel plans. They have RV spots with water + electric. That’s on I-10 and our family enjoyed it.

If you mean the Caverns of Sonora I second the stop. Not much of a campground, but the best cavern I've been to. Some photos from my 2012 visit: Caverns of Sonora

2gypsies wrote:
Only ONE DAY for siteseeing from California to Georgia? Can't you allow more time?

X2. I was going to recommend staying off the Interstate System and travel the side roads if you want to see America.
Unfortunately the OP probably has time constraints that will make this trip less enjoyable.

Weather wise you will likely be better off on I-40. I-10 is hot and windy from LA to the I-20 split in TX. I-40 gets up to cooler nicer weather after Kingman, AZ. Sight seeing depends on what you like to see. I would go I-40. I guess you are really talking about I-20 after you reach TX and not continuing on I-10 to San Antonio or Houston.

You can overnight at Sonoma Caverns in Texas and take in the Caverns without really messing up travel plans. They have RV spots with water + electric. That’s on I-10 and our family enjoyed it.

Only ONE DAY for siteseeing from California to Georgia? Can't you allow more time?

Mileage-wise it probably makes more sense to do I-10 to Georgia. Benson, AZ: Kartchner Caverns State Park. The tour is awesome and the campground very nice and it's only about 10 miles south of I-10.

Or make a stop anywhere in Hill Country of Texas. Fredricksburg, TX is a small German town and nearby is LBJ's ranch for a tour.