Ages of the kids?
By age 6 or 7, the extra space in the longer trailer will be greatly appreciated.
You are probably anticipating spending little time actually in the rig, just for sleeping, and maybe some meals. But there will be rainy days, cool days, hot days when everyone will spend most of the day inside.
IMHO it's usually easier to handle a longer trailer than a short one, especially when backing up. The longer the distance between the axles and the hitch, the easier it is to control backing up.
You didn't mention what you plan to tow the trailer with - i.e. your truck, SUV.
The 272BHS most likely weighs between 5,200-5,500 lbs. It can be loaded to 7,500 lbs total weight. That might be too weight for a HT pickup depending upon the individual configuration.
Yes I know the MFR listed dry weight is 5,030, but only the sticker on the actual trailer will show what it weighed when it was on the factory floor - without propane in the tanks, without battery, without spare tire, etc. One of the first things you should do after picking it up is take it to a scale and get an accurate weight of your specific trailer.
I pulled an almost identical size Grey Wolf bunk house with an F-150, and frankly 6,800 lbs with any wind made towing work, not fun. Actual CAT scale weight - it didn't have a slide - so that was about 5-600 lbs of the weight difference (The slide is worth the weight penalty - definitely, especially with kids). When I moved to a Ram 2500 truck, it made a world of difference.
If you have the TV (tow vehicle) capacity and a properly setup equalizing/anti-sway hitch - the larger trailer would be a better choice in my opinion.
