Trundle or Rollaway?

We'll be on the Carnival Fascination next week in an interior handicapped accessible room (E116). The room description says a trundle can be added for a 3rd person if needed (we have three people).

I've already posted this to the disabled cruising board but also posted here since its Carnival specific.

My question: Can a rollaway bed be used in these accessible rooms instead of a trundle? Also, is there sufficient walking room when all three beds are being used at night?

I'm 6'2" and would be the obvious choice to sleep on the trundle (since I'm the youngest) but a rollaway would make much more sense for me. My main concern is that my 93 year old grandmother have room to walk to the bathroom at night without having to climb over me in my trundle bed. (because she can barely walk at all)

Thanks in advance for your help :)

I would try to get a cabin that has three beds.. But I dont see Grandma climbing up to use the 3rd bed either.

The trundle sits very close to the floor and might be very hard for an older person to get up.

the trundle will be sitting between the two beds that are seperated against the wall

http://tom-n-cheryl.smugmug.com/CRUISES/Carnival-Sensation-March-31st/i-fM6wqMZ/0/L/IMG_0615-L.jpg

just for photo purpose to show how low it sits

http://s582.photobucket.com/user/mitziz/media/Triumph%20Cabin/IMG_0185.jpg.html

and with all three beds in place.

http://cdn.sixthman.net/images/norwegian/pearl/cabins/quad-interior.jpg

there are very few roll aways. Most are the trundles since they store easier. You could only hope for the roll away

My understanding of the trundle is that it is much shorter than the rollaway, thus you would be the least likely to fit! And even if you position the twins into a L shape configuration, adding a third bed on the floor is going to seriously handicap movement. EM