It's all about HOW you RV.
Going out for the weekend it's no problem setting up any size BBQ but the fact is that the Q and many others don't pack well because of their round dome design and others that are just big.
When you Full-Time and/or on the road more than just a weekend, SPACE is of the essence. How something packs away in those wonderful little bays we have becomes important. Space is real important for the smaller type RV owners too.
I've tried them all and gave them all away. I finally switched to the stoves. I have the coleman 2 burner for cooking with large pots and another one that is a grill. They are thin and fold flat and are easy to store.
They are sold under the names of; camp chief ranier, texsport, stansport, coleman. Found at all big box sporting stores.
This one covers just about all you needs including breakfast griddle.
All grill
And the trusty ole standby Coleman 2 burner for cooking big meals and using big pots
http://www.dickssportinggoods.com/search/index.jsp?origkw=camp+stoves&sr=1&kwCatId=&kw=camp+stoves&page=1