[en] Increasing the distribution of divertor plate heat loads is a central goal of ongoing boundary physics research in the fusion program. In one scheme, the gas-target divertor, it is proposed that puffing a high density neutral gas will open-quote extinguish close-quote the hot plasma before it strikes the divertor plates. The viability of this scheme has been demonstrated by basic experiments on PISCES, in which a dramatic increase in radial transport accompanied the development of the gas target. Here, the authors report on theoretical investigations of radial transport in an SOL plasma with a high neutral density. Previous work on ionization-drive drift wave turbulence is extended to regimes where γ_I, γ_cx > ω_*. In contrast to previous results for low neutral density, the particle and heat flux are found to be outward. Nonlinear rate balance is used to estimate fluctuation levels and transport coefficients. These are then used to develop a criterion for access to the gas target (neutralizer) regime