You can go to countries where you will get Visa on Arrival like in europe you can go to serbia. Bali and Ubud would be my recommendation. Or else visit Bhutan for its scenic beauty.
Visit decathlon, you'll find everything you need for carrying on that trek and really inexpensive puffy lightweight jackets to keep you warm there.... I bought the stuff from there only for valley of flowers trek
Hi we've done a bachelorette in Sri Lanka. started with the bars in Colombo for two nights and then moved to the beach in Hikkaduwa where the party was on the beach shacks and clubs.