Thanks for the responses so far - keep them coming. I really an interested to know if the back deck is really utilized often enough to justify the purchase of it and the trade-off of sometimes not being able to fit where we want to be. If not, we can consider a 5th wheel without it as we dont intend to carry any toys other than maybe a couple of mountain bikes.
Just to let folks know a little bit about us. My husband and I are taking an early retirement, within the next couple of months. We are looking to purchase an RV and tow vehicle and travel for at least a couple of years in the US and Canada. We want to just wander, meet people, check out towns for potential relocation. We like to hike and take pictures, and we play a mean game of canasta. We are newbies to this ourselves but my husbands parents have been full-timers in a DP for a dozen years and we have spent time with them in their home. We are also renting a 30' RV in May and spending a couple of weeks doing the Utah grand circle (visiting national parks we cannot take the dogs to).
We went to an RV show and saw the Voltage and liked the concept of the back deck and the garage space as a mud room for our dirty, wet dogs, and for sitting out there with them having an adult beverage! Research led me away from the Voltage and to the Cyclone/Road Warrior. I really do want the kitchen separated and my husband is really wanting that back deck so we are strongly leaning towards the 4000 Elite or the RW 390. Porthole - do you predominately stay in national and state parks?? Or is it that you just sit outside by the campfire and so you dont really need it? Real world experience is much, much appreciated.