Eat and Sleep
Tanis and its neighbouring town of San el-Hagar has little to offer. There are no hotels in miles, and the only food available is served from the simples restaurants. There are of course the usual selection of small food stores, so you will not starve. Faqus, 40 minutes south, has slightly better food, but no normal restaurants or hotels.
Although surprisingly time consuming, getting to Tanis and back is not difficult. Coming from Ismailiya or Cairo (Aboud station), head for Faqus first. You will have plenty of buses or shared taxis to choose from. In Faqus ask for San el-Hagar, which is just down the hill from Tanis. All taxi drivers know where San el-Hagar is, Tanis is easily misunderstood. If you come from Port Said, ask for a connection directly to San el-Hagar.
Getting back from Tanis, well, just reverse the journey getting there.
200 km south (3.5-4 hours): Cairo
60 km northeast (1 hour): Port Said
130 km east (2-3 hours): Ismailia