This
The moose in this area can be very transient and they move from high to mid to low elevation depending on pressure, predators and weather. My guess is you have a couple hot cows around and they will drag bulls from a long distance and you were in the right place. A week later there could be nothing. We had lots of encounters this year in some of our regular places, but also found a few new ones when some of our other reg spots produced nothing. At that time of year the bulls will be moving and most are not local. Most of the local bulls are shot during the early season and the bulls from other places move in.
Keep hunting it, but also look for some new areas that have the same type of habitat, access and elevation. You will need to have a back up, trust me.
Cheers
SS