not sure about accessibility around of end of March..
regarding transport, you will reach to Raikot bridge and then take Jeep from there which i remember charge 5000 for round trip.. people usually stay in Chilas for overnight and start early morning for Fairy Meadows as it takes good amount of time to reach Fairy Meadows and beyal camp is further ahead.. Jeep+Hiking..
for accommodation, hotel/lodge available in Fairy Meadows but not sure about Beyal camp, you might need to carry camp but wait for experts advice to get more details..