Four of us, all adults, will be in Kochi in late November 2018 for a four night visit, transiting to CMB. Hoping to book a two night houseboat trip on the backwaters in advance. Planning to stay at either the Marriott or Le Meridien. Any recommendations on a reliable agency for booking a luxury class houseboat or a direct booking resource? Specific vessel names would be helpful. Also, should we consider staying somewhere closer to the docks in Alleppey/Kumarakom? TIA.