Tampaite - I know you don't want to hear this, and I'm sorry to say it again, but as you have recurrently heard on the three different threads you have posted on this topic, ten is just a very unrealistic number to try to squeeze into a an RV. Add in that I expect you are likely trying to have some sort of pack 'n play or other bed for the 1 year old as well, and you won't even be able to walk around the unit, much less have any sense of comfort.
It is clear from your responses that you have your heart set on this idea - and you are hearing from people who love RV'ing in it's many forms. But, the overwhelming advice is clear, there are far better options for a group that size than squeezing them into 300 square feet for 48 hours! I assure you that, given the living space, your surprise trip would simply not be met with the type of joy you anticipate.