Can't speak for all inpatient settings but in the 3 that I have worked in, "med passes, initial assessments, ongoing assessments, monitoring clients and documentation" just about sums it up, in addition to admissions, discharges, and going back and forth with the doctors reminding them of what the patients need etc. And of course de-escalation and calming patients down and behavioral codes on occasion. And I like to do a lot of patient ed whenever possible. Occasionally I can squeeze in a group but its hard, time wise.
No IVs, caths etc, - at least, not under normal circumstances. (I remember just one patient with an IV, and one that I had to help straight cath - although if a med sure nurse hadn't happened to be a float that day, I would have asked for a med surg nurse to come help out). Some wound dressings, though. And sometimes baths and incontinence care.
As for a reasonable patient load - hah! That depends on just how superficial your patient care is expected to be. And on acuity. On my unit 6 patients is routine and although we are technically able to go up to 8, we never do - the charge nurse takes the extra patients. So much depends on acuity though - recently one of our teams had only 4 patients on it and it was way more work than my team with 6.