How are the wait times for the rides? On a crowded night?
Wife and I went to the Sunday party on September 23rd in 2018 and walked onto EVERYTHING besides 7DMC and PP. We thought about attending the Friday night party with my brother that year, but our agent told us to avoid the Friday parties since they're the more crowded, largely due to locals not having school or work the next day. It's somewhat tough to tell how a Tuesday night party will be since it's new, but we're still planning on going to the one on the 22nd with DD (she'll be 18 months old). I'd think a Tuesday party might be slightly more crowded than a Sunday party (or less, I really don't know), but likely not as crowded as a Friday party so you should be able to get onto most rides with relative ease.
The parade and Hocus Pocus show might be a bit crowded, but parades are always crowded and you kind of have to expect that special event ones are going to draw even more eyes. We got to the parade route late, and still managed to snag a seat right on the curb out front of Casey's.