For anyone looking for confirmation - I booked a Remy BG this morning at 7am, then switched my reservation to DHS and went there.
The BG was in the 50s with an expected callback of 1:30pm. It ended up being a little later, but that was a perfect for parkhopping. No issues.
(My goal was to be slightly slow on joining the VQ, but, in this case, it was a total accident. I set my alarm for 6:59am and had some kind of brain lock with 30 seconds to go - it was suddenly 5 seconds to 7am, and I was scrambling just to get anything.)
Though I didn't have to worry about the timing - I wanted to note: during my two rides this visit, I noticed that the CMs at the entry point were announcing "Now accepting Groups 50 and lower". Even though the signs say "Groups 40-50", they seem to be taking any called BG that day - it doesn't seem like they're enforcing the return window at the moment.
(I was technically a half-hour late for my first ride this trip, which was a low-ish BG in the morning that was called far earlier than predicted, and they didn't bat an eyelash.)