there are tons and tons of thailand tour companies that do the ayuthaya/Bang Pa In day tours from bangkok and the one we booked was at the River Sun Cruise, which is the chao phraya river cruise and big bus tour combination and included in the price is the chao phraya river cruise, buffet lunch, entrance to bang pa in summer palace and assorted sites in Ayuthaya City. They also do various bangkok city tours and other ayuthaya city tour combinations.
Price of an ayuthaya and bang pa in river cruise and bus combination with buffet lunch is 2,200 baht per person.
Once you booked the Ayuthaya/Bang Pa In Summer Palace whole day tour in whatever combinations, you would be provided with free brochures and maps and guides along the tour itinerary and not all the ayuthaya/Bang Pa In day tours follow the same itinerary. the first your i did in 2007 has wat si san phet, wat chai wattanaram and viharn mongkol was the sites we visited while here on a revisit in 2012, we had the wat maha tat, wat na phra mane and wat lokayasutharam as the sites we visited besides the bang pa in summer palace.
the free guides given by your tour company has detailed incsriptions on these site and many languages.
Visitors are requested to be dressed properly and appropriately upon entering the ground of the Palace. Thus the following dress - code (applicable to both ladies and gentlemen) will be strictly enforced:
1. Shorts, mini-skirts, short skirts, tight fitting trousers, as well as tights can not be worn as outer garments.
2. See-through shirts and blouses, as well as quarter length trousers can not be worn.
3. Sleeveless shirts or vests can not be worn as outer garments.
4. Sandals (without ankle or heel straps) can not be worn.
5. All shirt sleeves, whether long or short, can not be rolled up.
6. Sweat shirts and sweat pants, wind-cheaters, pajamas and fisherman trousers can not be worn.
However, proper cloth are provided there for visitors to borrow and put in cover visitor’s cloth while get into the inside of The Palace.
Certain trees gain a reputation for harboring a spirit so you see flowered offerings and ribbons hanging off of them. This one is just as you enter the grounds of Bang Pa In.
Here is a link to some information about animistic practices in Thailand: