Quote Originally Posted by kitronit
When it comes to roadtrips, your site is the single greatest thing on the internet!
Always nice to hear!
Leave Las Vegas Monday morning heading for Grand Canyon (I-15 -> I-59 -> 389 as recommended by some thread or other on this forum), spend Monday afternoon-Wednesday afternoon there (thinking about hiking South Kaibab-Cedar Ridge , Tusayan museum and ruins, maybe some horseback riding?) and driving north by scenic drive (Desert View (64), north on 89 thru Painted Desert, past Jacob's Lake and up to Bryce Ntl Park).
Like the message posted by Utahtea, I think you have your route a little confused. To reach the south rim and see the things you have mentioned, you would need to travel south from Las Vegas. The most direct route would take you over Hoover Dam and there are large signs proclaiming that Hoover Dam is CLOSED to all RV and truck traffic. This is not actually true, you can cross Hoover Dam but your vehicle will be searched. If you don't mind some intrusion you would use US-93 over the Dam down to Kingman and I-40 over to Williams and then north on AZ-64 to the Grand Canyon.

If you would prefer not to be searched at the security checkpoint, your route will still be south -- US 95/US93 but you will stay on US-95 and go south to the the Laughlin cut-off (NV-163) to AZ-68 to I-40 at Kingman on on to the east. If you do go via Laughlin and you like petroglyphs, -- take an hour or two and check out Grapevine Canyon. The turn-off will be on your left near the bottom of the hill (although it is a gravel road -- your RV will have no problems).
Recommended sightseeing at Zion, anyone? Btw, are there any nice inns at Zion?
The inn and cabins at Zion are great. Dinner and cocktails on the terrace at the inn can't be beat in the summer!

Have fun!

Mark