There are perks and disadvantages. Boondocking in the extreme sense, I think would be better with no slides. Less air leaks around slide mouldings and less volume to heat or cool. Same can be said with the higher, unnecessary ceilings on new coaches. Dark paint is another bad thing on new coaches for boondocking... sun heats up dark paint big time as opposed to the old white gel coats.
I do like the added space the slides afford though and I personally like them.
I camp in the woods quite a bit and never had a problem. Worst cases I had to move so the slide was inbtween trees but I always seem to manage to find a suitable spot.
Resale value is far greater with slides and you have a bigger target market to sell to.
2011 Allegro 32CA \ 2013 CRV toad
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99' Winnebago Adventurer /Towables