We are fairly seasoned campers prior to having our toddler. Always used blow up bed (or rollaway mat if roughing it). Considering another option as find air mattresses pop even when layered underneath and can't get comfy. We would like to be able to sleep together if possible so considering a double raised bed, but also wondering how the bar down the middle doesn't make this incredibly uncomfortable? Do people use a SIM on these and if so, any recommendations on thickness, whether to use a double or 2 singles? Don't want to spend a fortune as just upgraded our tent but also do like to be comfortable. Toddler will be on blow up toddler bed