I only use mine about 3 time a year and definitively went diesel....however my 3-4 time covers about 6,000 miles. To me, the level of comfort, being able to go 40 ft, the ride, and general quality were far more important.
Now, if I had a family and stayed pretty close to home...say 500 mile radius I would even have a motor home at all and would have stuck with my TT or gone to a smallish 5er, around 30' of so. To me, having the extra drive train simply wouldn't be worth it.
Dick
2002 43' DP Beaver Marquis Emerald Cat C-12 505 HP, 1600 Tq
2003 Jeep Grand Cherokee Overland ---toad