From Seattle here.. I'm 8mos pregnant, and do travel with dogs. Is it worth it to visit this place? (Worried if there's a lot of stairs, and if visiting JUST the lower level is worth the time)

There is an elevator which takes you to the Upper Level, with a ramp up to it. However, we allow dogs on the lower level and it is beautiful. On the lower level you find the Grotto, the Station of the Cross trail, St. Philip Benizi’s Retreat, the Chapel, the Christus Garden, the St. Peregrine Shrine, the Visitor Center and Gift Shop. We hope you have a wonderful visit.

There is an elevator to the top...yet timewise, the traveling/distance spent might be a consideration. If driving or flying/train...All the best to you and yours.