I have been keeping them down just to keep the rig level (My driveway is not) and take some weight off the tires. I have a 5'er so the front has to be down anyway. I also figured that 2 more points of ground contact plus clamp chocks between the wheels would minimize stress on the front gear, since it's sloped downhill.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW