Is there any way to see if more of my pages are being indexed by Google without logging into Google Sitemaps?

You can check to see how many pages Google has indexed simply by using Google operators. Google operators and simple codes you insert into the search field right before you type in the URL you are researching. My favorite operator is 'site:'. Just ring up Google.com and type this string (no qoutations) into the search field 'site:yoursite.com'. Insert your domain where it says 'yoursite'. The results will show you at the top of the page how many pages Google has indexed of the site fed to it. As long as this number grows over time, then it means you're indexing new pages.