Hi
Enough but not enough LOL. I have to say that 8 day seems long but to explore a mystery country like Cambodia, maybe you will feel it’s not enough. However, I suggest you here an itinerary starting in Siem Reap,
DAY 01: ARRIVAL – SIEM REAP
Warmly welcome at Siem Reap International airport, you are met and transfer direct to hotel for check in.
Lunch not included
Visit the ancient Khmer civilization site of Hariharalaya.
Overnight in Siem Reap.
DAY 02: SIEM REAP – ANGKOR TEMPLE COMPLEX (B)
Breakfast at hotel
Visit to Ta Prohm
Visit to the unique interior brick sculptures of Prasat Kravan, Srah Srang (“The Royal Baths” was once used for ritual bathing), Banteay Kdei (surrounded by 4 concentric walls), Ta Keo, constructed in late 10th early 11th century C.E, the first temple to be constructed wholly of sandstone.
Dinner not included and Overnight in the hotel in Siem Reap.
DAY 03: SIEM REAP – ANGKOR TOURS (B)
Breakfast at hotel
We drive to Visit the antique capital of Angkor Thom (12 century).
It is time to visit the most famous of all the temples on the plain of Angkor: Angkor Wat. Enjoy wonderful sunset from the top of Phnom Bakheng Hills.
DÀY 04: SIEM REAP – BOAT TRIP – KAMPONG THOM (B) 
Enjoy a boat ride on the Tonle Sap lake. This is the largest permanent fresh-water lake in South East Asia and flows into Tonle Sap River, joining the Mekong in Phnom Penh. We will see a fishermen’s “floating village” with floating schools, floating police station, etc. It is same as a big village floating on the lake, and the “village” move from place to place following water levels and current. Lunch not included 
In the afternoon, travel by bus and English speaking guide to Kampong Thom, this trip will take you more than 2 hours drive via the country Cambodian road, villages and lakes. Check in at hotel in Kampong Thom.
DAY 05: KAMPONG THOM – SAMBO PREI KUK – PHNOM PENH (B)
Breakfast at local restaurant
This morning, we will drive out the main road through again the Khmer villages to see the hidden Prasat Sambo Prei Kuk group located about 40 kms from Kampong Thom. This trip will require you to do a long walk through the small bushes and trees.  In the afternoon, we will drive on to Phnom Penh which takes another 4 or almost 5 hours drives.

DAY 06: PHOM PENH CITY TOUR (B)

Visit the Royal Palace, built by King Norodom in 1866 on the site of the old town, and the Silver Pagoda. Then continue your visit at the National Museum
In the afternoon, visit Phnom Penh and reveal the chilling events of Cambodia’s past at S-21, the notorious Khmer concentration camp, and Choeung Ek, the site of the infamous Killing Fields, and the Russian Market is a good place to pick up a traditional krama.
DAY 07: PHOM PENH – SIHANOUKVILLE BY PRIVATE BUS (NO GUIDE)
Arrives in Sihanoukville, check in at hotel
Rest of the day at leisure
DAY 08: SIHANOUKVILLE – PHNOM PENH – DEPARTURE (B)