Oh, I love Moose's face! He is just beautiful. He looks Basenji-ish to me, but whatever he is, you two are going to have SO much fun and love together!!!!!
Where did Nala come from? Can she stay there while you're out of town?
I did not have a good experience with Rover.com. Don't do it.
Can you find and make friends with another basenji owner in your area where you can take turns pet sitting? Maybe you can find local basenji owners on Meetup or Facebook?
My heart would break to leave her at a boarding facility or a vet although she'd probably be fine. I like the idea of a pet sitter staying at your home ONLY IF you can really train the pet sitter on several visits before leaving in August (not far away!!!)
We got Killian from a breeder in Ohio–-Jim Edgerton. That's where he had gotten our previous male basenji. We took Logan and Jasmine to his place and looked at several 1 year olds and a puppies and Jasmine eliminated the others and we agreed with her pick.