Sharing the Road - Trucks and Motorhomes

At the young age of 50 (back in July) I decided to buy a 38' motorhome and see some more of our great country! After several months of travelling, I've observed some really dumb motorhome drivers, and have picked up on the fact that there isn't a whole lot of love lost between the Motorhome/Trucker drivers.
Obviously, I'm a GREAT driver! I make sure I know where you guys are, get over to let you pass, flash you in if you've got someone on your tail and ALWAYS flash my markers when you flash me in after passing. I stay out of your way at Flying J. I DO, however, sometimes take one of your spots at a rest area (Well - it does say Campers --->)
Assuming I could use some improvement in sharing the road, and knowing that there are other motorhome drivers that definitely could, what are some of the things I can do to keep us all safe out there? (I mean, besides stay home)

 

A test might not be a bad idea. While I'd rented several C-Class RVs and an A-Class, when I finally got around to buying, the "driver training" was 5 minutes in an abandoned Wal-Mart parking lot and a 10 minute trip on I75. If you've never driven anything bigger than an SUV, it's a big step up to gain an awareness of how much road you take up.

I think one problem that Motorhome drivers have is that a lot of people have never learned to use their mirrors, or don't bother checking them. Thankfully, one of my summer jobs (19 maybe?) was driving a stake-body chase truck for a mobile home company. There were times when we'd back down long dirt roads with the truck, toter and trailer - I learned real quick how to back up with my mirrors, and insure I had a good idea of what was happening on both sides of me.

Another problem, and this isn't motorhome specific - though I've seen too many of MH drivers guilty, is that too many people are completely unaware of what anyone else is doing around them. If you're screaming down a hill in the left lane, you'd better believe I 1) already know you're coming and 2) have already figured out how to get out of your way. I swear, too many people out there are only looking at the 40' of road in front of them.