the beyal base camp is the North Face Base camp and i have been to both the rupal and NF BC. if u r in that regon it is much more feaslable to do Rupal face base camp (polish BC) frm trashing......
for NF base camp ul have to make an additional trip to Fairy Meadows....
both r butiful treks and at same adevnture level i guess......
so dont base ur decision on that. i suggest u attemp from trashing side.