Is Towing a 40-Footer Cross-Country too big??

Don't be intimidated, just go. I find that stores that have gas stations, like Walmart and some grocery stores in their out lot are more accessible than the usual corner station in town. Don't wait until you're on empty to find a gas stop. I start looking when I hit 1/2 tank. You look like you have a great set-up now, why change it? Sure, you might be limited in some state parks in your ability to fit but there is always some place you will fit. Don't deny those kids the experience of seeing this great country, they will remember it all their lives. To stand on the rim of the Grand Canyon for the first time is breath taking. Just go. Things will work out. Thousands of other people do just fine.