One possibility to consider is potentially do only three hotels/locations, instead of four, because the constant checking in and out may feel a bit rushed/too much, but it may also depend on your style.
One thing I would recommend for sure is to write in in advance (a few days before) to all hotels/concierge to notify them of the occasion, which may end up scoring some upgrades or at least some freebies/cakes, etc. This would work better if you have status in any of the hotels. The Conrad team is good.