I look at it from all angles. Definitely not the 4th, definitely not the 5th (holiday weekend, so many folks will still be at DLR on the 5th). Lately, a few folks have reported on the DIS that Tuesdays have been much more crowded than Mondays, for some odd reason, so you may want to skip Tuesday and do Monday instead because of that info. However, lots of folks will probably 'extend' their holiday weekend to continue into Monday, so the parks may be extra crowded that day, leaving Tuesday the better choice. A lot of people will definitely be back at work by Tuesday, so that is probably the better day, but it may still be pretty busy if recent reports of Tuesdays are accurate.