2016 son did this summer before last. Straightforward format. Sort of what I have heard referred to as a standard "pro-style workout":
1. Warm ups and catch
2. 30/60's for time (one run) with a watch at 30 and another at 60.
Then break into groups and:
1. standard OF test while IF does SPARQ, then switch
2. standard IF test while OF does SPARQ
Then BP, three sets of seven swings, then Pitchers throw pen for velo, etc.
After lunch simulated game switching pitchers every 20 pitches or five batters. BBNW guys very attentive to each boy with clipboards the whole time. We did one of the later PECs at Tacoma CC in late July (was the only one that didn't conflict with travel/club schedule) and got an invite to play for one of teams in the NW Championships in Centralia within a few weeks. Couldn't do it because we went to PG World Series in Fort Myers at the same time. Got an email to join the one of the two 2016 teams in the Arizona Fall Junior Classic the following summer and did that in October.
Recommend the experience as the workout is largely what he'll do at every camp or tryout he attends from here on out. The Centralia tournament is recruited fairly well and is good for rising seniors in particular, although it also a good way for younger pitchers to get seen in their tournament as well.
That said, BBNW is not the only travel opportunity in the NW and I urge you to consider Team Northwest, and others too.