Yeah, pitch & tenbear -- What I was getting at is that you are more likely to find yourself in heavy traffic and tight parking situations and campgrounds/RV parks with small sites back east than out west.
If you survey the RVs you see on the interstates on both sides of the country, you'll see a lot more 40' diesel pushers and 35' fifth wheels on the west side of the country than the east side.
Cities are congested everywhere. We are currently in San Diego, which can be very challenging in a long bed truck, never mind pulling a 36' fifth wheel, both in town and on some of the tiny country roads in the hills nearby, so you can definitely find tough driving situations on both coasts.
No biggie, it's just that my hubby won't drive our 52' long rig in the eastern states (and neither will I!), and we're both from there so we know the roads and have lots of reasons to go visit. When we go we will be traveling in a truck camper.