Ranong very easy, boat to mynmar site for 700-1000thb, they make copies for you, give you 10usd banknote if you dont have, ranong IO very friendly and always without problem for me
yes this border .. 960thb for cross with minibus and myanmar stamp, easy ... Never had problem (knock knock :D ) even on airports, never asked for nothing
ranong was good, i have passport full of back to back tourist visas, metv, setv and officer on departure always gave me a new arrival card and said see you soon :D i always have 3 proofs with me, but never asked