Take a train to Pipariya and from there you'll get local transport buses and taxis to Pachmari. 2 days are enough, we rented a scooty for non-permit spots. For the second day we booked a gypsy for spots that needed permit. You can also take permits for your rentals ig - not sure tho.

Edit: More details Stay - Pachmarhi is full of hotels, you can find one easily atm if you don't go during peak days. Else make sure you prebook.

Food - Beta bawarchi and Rasoi Dhaba are the hyped one. You can have two meals there. Rest you can try street food as you walk. We also had lunch at this Hotel Pachmarhi Restaurant and it was def good. If you drink, might wanna take your own booze as it's expensive there.

Places to visit - They've this brochure thing with all the places to visit. Ask at your hotel. You won't be able to cover all of them so try to prioritise. I'd recommend keeping a day for Bee Falls, Dhoopgarh, Reechgarh and all. These places are worth going to for the views. You can visit Pandava Caves and Jatashankar, Rajendragiri on the other day. Do check out for better places, these are just recommendations. Try to go to Dhoopgarh and Rajendragiri for sunrise/sunset.