Extended bed end so you can sleep north/south is really one of the best ideas........ for the rear of the camper. Benefits of leaving the front bed end stock is so you can access the rear of the tow vehicle whilst still being hooked up and set up overnight, you can still move location (relatively close) and turn corners whilst set up.
No:1 Dust proofing system.
Screen awning for the drivers side is very handy.
Dual 9kg gas bottle holder & dual 20L water/fuel containers on the draw bar is also very handy.
Dual spare wheel holder on the rear bar.
Cut away rear is also handy but have seen it on these types of campers.