I still had to pass through Customs, but had no problems. US customs was no problem, either. This was a most successful trip. Being a courier, it still costs, but quite a bit less. Traveling solo has advantages, you can eat, sleep, swim and travel as you please.
Guesthouses are the most reasonable places to sleep, and some can be very neat.
Of course toilets are separate. Nowhere did I have problems with bugs, mosquitoes, flies, roaches, rodents etc. Every week I took a Malaria pill. Busses and trains are excellent modes of transportation. Taxis can be used when necessary, but buses and trains are a cheaper and avoid traffic problems.