Day one drive to Tarangire national park about 3.5 hours of drive from Moshi/Arusha, enjoy the game drive for the rest of the day, overnight.
Day two early in the morning drive straight to Serengeti National park via Ngorongoro conservation area,,, game drive on the way,, arrive to Serengeti around 8/3 enjoy game drive in Serengeti for the rest of the hours, dinner then overnight.
Day three early in the morning game drive in Serengeti, about 4 hours then on transit game drive to Ngorongoro conservation area for overnight.
Day four early in the morning after breakfast drive towards Ngorongoro crater for the game drive,, for about 5-6 hours then after lunch drive up the crater towards back to Moshi/Arusha.
You can also opt topass to Masai village/Olduvai Gorge historical site.
Listed below are hotels/lodges/resorts that the safari tour operator can accomodate for you.