You'll be fine! I was nervous about coping when DH started to travel regularly expecially with a newborn and a toddler but works out its not bad at all. You probably will need to change the routine a little and do things differently. For example when DH is away my kids usually get dinner and bed earlier than usual, I make an easy meal I know they'll eat and I clean up while the kids eat so after bath and bed I have little to clean and I can have my dinner in peace. I try to take the kids out or do activities so I can be sure they'll sleep. Just make your life as easy as possible.