You can expect this deal to come in at about $2.3 or $2.4m over four years. UPDATE: Rich Cimini confirms that the deal is for "about $2.4m" on twitter.
Under the new CBA, it's become a lot easier to sign rookies, so I don't expect much of a hold-up in getting William Campbell and the two first rounders signed. Geno Smith might see a slight delay, since he's currently still searching for a new agent, but rookies can participate fully in the rookie minicamp without a deal in place, so there's no hurry.
Campbell will end up with a deal in between those of Aboushi and Bohanon. Dee Milliner and Sheldon Richardson will get four year deals with a fifth year team option, likely fully guaranteed. Those deals will total $11.5m and $10m respectively. When Smith's deal does get done, he'll get around $5m over four years.