The Stan's rim tape was slightly damaged by the flat. Two evenings ago I replaced the rim tape, mounted a new tire, inflated, deflated, added sealant. This was a completely painless process. Didn't even need to use tire levers to mount the tire. Took the bike on a 12 mile test spin and by some miracle the tire stayed inflated.

With regard to mounting difficulty tubeless tires are apparently no different than their tubed-tire counterparts. Some tire/wheel combinations area bear, others less so. BTW, I'm not running tubeless-specific rims (Velocity A23).