I have a gate at my stairs and just take them up one at a time. It is quick carry up, dump in bed, cover and say naptime and then leave. Repeat ....so right now three trips up to beds. Then put those on mats that sleep on main level to bed. I think each one likes that little bit of personal and I also find they can be too tired to climb up too although resistance so they don't have to nap is most likely the case. Put baby in playpen or exersaucer on main floor while you carry other child up and tuck in quick and leave. Then do baby. Not worth the struggle.