We had similar length restrictions however we had more people. AGS is important if you have animals or kids as we do. Sometimes our 9 year old wants to stay in the coach and watch TV. I really like the AGS which can start the generator if it is too hot in the coach or if the battery drops to a preset level. The other thing with diesel is the very quiet diesel generator compared to the gas one. A 3600 RPM gas Onan generator is very loud however the QD Onan series generators are quiet and efficient. The other thing I have noticed on DP units is the use of "whole coach" inverters which means that most user outlets are running through the inverter if not connected to shore power (they have an internal transfer switch) which means you don't need to hunt for a live electrical outlet when cruising down the road. In our unit all the outlets except the roof AC are on the inverter - this includes the microwave! I love this. Gas units not so much. Usually they have small inverters that only power the TV and or entertainment center. Our DP is only 34' 6" stem to stern. In a pinch we can "overhang" the front about 30" if we need because it is only a 208" wheelbase. The cool thing is with a 55 degree wheel cut and a 208" wheel base it turns on a dime for a MH. Gas units for the same length have a much longer wheel base and less of a wheel cut - however it depends on the manufacturer.