There are always trade-offs. The capo gives, but it also takes away. A new tuning gives, but it also takes away. Same for extra frets. Each of these ideas have uses, but learn when to use each of them to take advantage of their benefits and minimize the drawbacks. As an example, most songs start on the 1st,3rd, or 5th note of the scale. Sometimes they start on the 3rd or 5th below the lowest-octave 1st note used in the song. The melody walks up to that 1st note. You Are My Sunshine doesn't hit a "1" until the word "Sun." If we tune or capo so that our melody string is tuned to a "1" or "8", we have to find these lower notes on the middle string. Pretty simple for finger dancers, but tough for noter players. A better alternative for noter players is a tuning that places the melody string tuned to the 5th of the desired scale. In this example, the capo may not be the ideal answer. Learn to use different tunings as well as capos. Extra frets can make certain things easier, but to use them to eliminate retuning can limit our learning, particularly where modes are concerned.
Babs, you may want to try tuning DGdd, letting your root be on the middle string instead of the bass string. This is what some people call a "new" mode. Actually, the mode isn't new, just the tuning is new. Traditionally, the root or key note, was on the bass string, and the middle string was a 5th above it. In new modes, the root is on the middle, and the 5th is below it, on the bass string. You have to reverse the fingering of these two strings to use the GDdd tab. But learning a song or two will have you well on your way, and you will find you have learned something very useful. These new modes are not really new, they are called inversions by chord players. Guitarists, mandolinists, and keyboard players have used inversions for a very long time. Dulcimer players seem to have only been playing chords a short time, relatively speaking, but we invert them in standard tunings as well as new tunings. Every time we relocate a chord in a different part of the fret board, it is an inversion.
Paul