national park in india

hey other travelers

i trying to find out which is the best national park in india with the very
high change of seeing tigers and also take some very good photography of
them. which is the best accomdation for the main national park in india

Also i see one travel company does a ranger program that you get to see
tigers etc but i was wondering if their any cheaper ones and what other
travel agents arrange them?

i am into tiger in a big way and would like to get as close as possible but
i dont know what is the best ways.

i want to go to india for as long as possible

I know i need to get a visa to go to india and also what other information
might i need etc, how experince is inida?

many thanks

ps if it make any different that i am from the UK and will be departing from
either london gatwick or london heathrow