>If I could plan my perfect holiday it WOULD definitely 'would' be long, 'in AT a reasonable price and 'wealthy in attractions travel' (cos tu nie tak).
I would go 'for a backpack' (nazywamy to 'backpacking') around USA.
Moreover that way 'to' OF travel will make you more independent.
I would go there with 'a' (a dlaczego uzywasz 'a' jak jest friends-l. mnoga?) several friends who are interested in culture of THE West(moze lepiej WESTERN culture). The perfect season of the year to 'departure' DEPART (tu ma byc czasownik) is autumn because I don't like high temperatures.
'If about' (nie, nie tak, tutaj AS TO THE) kind of transport 'I'm' I WOULD 'choosing' CHOOSE A plane to get to America and later to travel there I would choose bus and train due to financial reasons.(ale tu nie jest jasno kto ma te financial difficulties - czy to ty, czy te busy i trains?)
After 'the' (niepotr) intensive sightseeing of cities we would stay in some cheap hotel for 'a' (niepotr) one night and on the next day we would set out on a journey.
In conclusion I can say that THE best way 'to' FOR A holiday for me is backpacking without superfluous 'facilitations' (nie wiem dokladnie, czy to slowo masz na mysli - napisz po polsku co chciales powiedziec).